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Sentence Correction | MaargX UPSC | Rules, Examples & Practice Questions

A MaargX UPSC Complete Grammar Guide | Rules, Examples & Practice Questions

Sentence Correction is the art of identifying and rectifying grammatical, syntactical, lexical, and structural errors in written or spoken English. A grammatically correct sentence must satisfy rules of subject-verb agreement, correct tense usage, proper pronoun reference, accurate preposition use, logical parallelism, appropriate article usage, correct word order, and idiomatic expression. Sentence correction tests the ability to detect subtle violations of these rules and produce error-free, clear, and unambiguous sentences.

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📖 Complete Concept Explanation

Definition

Sentence Correction is the art of identifying and rectifying grammatical, syntactical, lexical, and structural errors in written or spoken English. A grammatically correct sentence must satisfy rules of subject-verb agreement, correct tense usage, proper pronoun reference, accurate preposition use, logical parallelism, appropriate article usage, correct word order, and idiomatic expression. Sentence correction tests the ability to detect subtle violations of these rules and produce error-free, clear, and unambiguous sentences.

Core Categories of Sentence Correction

  • Subject-Verb Agreement — The verb must agree in number and person with the subject.
  • Tense Consistency — Tense must be logically consistent within a sentence and paragraph.
  • Pronoun-Antecedent Agreement — Pronouns must match their antecedent in number, gender, and person.
  • Parallelism — Items in a series or list must follow the same grammatical structure.
  • Misplaced and Dangling Modifiers — Modifiers must be placed immediately beside the word they modify.
  • Articles (A, An, The) — Usage must follow rules based on definiteness and vowel sounds.
  • Prepositions — Fixed prepositional collocations must be observed.
  • Conjunctions and Connectors — Correlative conjunctions must be used correctly and symmetrically.
  • Comparison Errors — Comparisons must be between like items using correct comparative/superlative forms.
  • Redundancy and Conciseness — Avoid repetition of meaning or unnecessary words.
  • Word Order — Adverbs, adjectives, and phrases must follow English word-order conventions.
  • Double Negatives — Only one negative element is permitted in standard formal English.
  • Conditional Sentences — The correct combination of tenses in if-clauses must be maintained.
  • Passive and Active Voice — Voice must be deliberately and logically chosen.
  • Reported Speech — Tense and pronoun shift rules must be applied when converting direct to indirect speech.

Key Comparison: Common Confusables

Term / PairWhen to UseExample
Fewer / LessFewer = countable nouns; Less = uncountable nounsFewer books; Less water
Between / AmongBetween = two items; Among = three or moreBetween Ram and Raj; Among the students
Since / ForSince = point of time; For = duration of timeSince Monday; For three days
Who / WhomWho = subject; Whom = objectWho called? / To whom did you speak?
Lay / LieLay = to place (transitive); Lie = to recline (intransitive)Lay the book here; Lie down and rest
Affect / EffectAffect = verb (to influence); Effect = noun (the result)The rain affected the match; The effect was severe
Principle / PrincipalPrinciple = rule/belief; Principal = main/head of schoolFollow the principle; The principal signed it

Memory Tricks and Mnemonics

FANBOYS (For, And, Nor, But, Or, Yet, So) — Coordinating conjunctions that join independent clauses.

SWABI (So, When, After, Before, If) — Common subordinating conjunctions; the clause they begin cannot stand alone.

NEVER SAY NEVER TWICE — Reminder to avoid double negatives in formal English.

CLOSER WINS — For neither/nor and either/or, the verb agrees with the subject closer to it.

PAST BEFORE PAST — If two past actions occur, the earlier one uses past perfect (had + V3).

SOUND, NOT SPELLING — Article 'an' is chosen based on the vowel sound, not the written letter.

WHO DOES; WHOM RECEIVES — 'Who' performs the action; 'whom' receives it. Substitute 'he' for 'who' and 'him' for 'whom' to test.

📐 Grammar Rules

RULE 1: A singular subject takes a singular verb; a plural subject takes a plural verb. Ignore phrases between subject and verb when determining agreement.
Ex. 1 The quality of the goods IS excellent. (Not 'are' — subject is 'quality', singular)
Ex. 2 The team of engineers HAS submitted its report. ('team' is singular, not 'engineers')
Ex. 3 Neither the manager nor the employees WERE present. (verb agrees with nearest subject)
RULE 2: When two subjects are joined by 'either...or' / 'neither...nor', the verb agrees with the subject closer to it (the nearer subject rule).
Ex. 1 Either the students or the teacher IS wrong. (verb agrees with 'teacher')
Ex. 2 Neither the CEO nor the directors WERE available. (verb agrees with 'directors')
Ex. 3 Either the books or the pen HAS been misplaced. (verb agrees with 'pen')
RULE 3: Indefinite pronouns such as everyone, someone, anyone, nobody, each, either, neither are always singular and require singular verbs.
Ex. 1 Everyone in the hall WAS asked to be silent. (not 'were')
Ex. 2 Each of the answers IS correct. (not 'are')
Ex. 3 Neither of the candidates HAS qualified. (not 'have')
RULE 4: The past perfect tense (had + V3) is used for the action that occurred first when two past actions are described. Simple past is used for the second (later) action.
Ex. 1 By the time the police arrived, the thief HAD ESCAPED. (escape = earlier)
Ex. 2 She found the book that she HAD LOST two days ago.
Ex. 3 He admitted that he HAD NEVER VISITED that city before.
RULE 5: A pronoun must agree with its antecedent in number and gender. Collective nouns, indefinite pronouns, and compound subjects require careful pronoun selection.
Ex. 1 Each student must submit HIS OR HER assignment on time. (not 'their' in formal usage)
Ex. 2 The committee has announced ITS decision. (committee = singular, 'it' not 'they')
Ex. 3 Everyone should bring HIS OR HER identity card. (not 'their')
RULE 6: Parallel structure requires that items in a list or joined by coordinating conjunctions have the same grammatical form (all gerunds, all infinitives, all nouns, etc.).
Ex. 1 He likes reading, writing, and TO DRAW. [Wrong] → He likes reading, writing, and DRAWING.
Ex. 2 She is smart, dedicated, and HAS TALENT. [Wrong] → She is smart, dedicated, and TALENTED.
Ex. 3 The report was clear, concise, and COVERED EVERYTHING. [Wrong] → ...and COMPREHENSIVE.
RULE 7: A dangling modifier has no clear subject in the sentence. A misplaced modifier is positioned too far from the word it modifies. Both must be corrected by restructuring the sentence.
Ex. 1 WALKING DOWN THE ROAD, the trees looked beautiful. [Wrong — trees don't walk] → Walking down the road, I noticed the trees looked beautiful.
Ex. 2 She almost drove her children to school every day. [Wrong — implies she almost did it] → She drove her children to school almost every day.
Ex. 3 He only eats rice. [Ambiguous] → He eats only rice. (modifier placed beside what it qualifies)
RULE 8: 'The' is used before a specific or previously mentioned noun. 'A' is used before singular countable nouns beginning with a consonant sound. 'An' is used before vowel sounds (based on pronunciation, not spelling).
Ex. 1 She is AN honest woman. ('honest' begins with a vowel sound /ɒ/)
Ex. 2 He is A university professor. ('university' begins with consonant sound /j/)
Ex. 3 THE sun rises in the east. (unique, specific noun → 'the')
RULE 9: Correlative conjunctions (either...or, neither...nor, not only...but also, both...and) must connect grammatically parallel elements. The structure after each part of the pair must be identical.
Ex. 1 She not only WON the race but also BROKE the record. (verb + verb: parallel)
Ex. 2 He is either LAZY or CARELESS. (adjective + adjective: parallel)
Ex. 3 Both the TEACHER and the STUDENTS were praised. (noun + noun: parallel)
RULE 10: Comparisons must be made between like items. Never compare a person with an object, or a noun with a clause. Use 'that of' or 'those of' to make comparisons grammatically balanced.
Ex. 1 Her score is better than THAT OF her sister. (not 'than her sister')
Ex. 2 The climate of Mumbai is different from THAT OF Delhi. (not 'from Delhi')
Ex. 3 His arguments are stronger than THOSE OF his opponents.
RULE 11: Conditionals follow fixed tense combinations. Type 1: If + present, will + base. Type 2: If + past, would + base. Type 3: If + past perfect, would have + past participle.
Ex. 1 If it RAINS, we WILL cancel the match. (Type 1: real/possible condition)
Ex. 2 If she STUDIED hard, she WOULD pass. (Type 2: hypothetical present/future)
Ex. 3 If they HAD LEFT earlier, they WOULD HAVE caught the train. (Type 3: impossible past)
RULE 12: Double negatives are grammatically incorrect in formal English. Two negative words in a sentence cancel each other, creating a positive meaning — use only one negative element.
Ex. 1 I don't have NO money. [Wrong] → I don't have ANY money. / I have NO money.
Ex. 2 She can't do nothing about it. [Wrong] → She can't do ANYTHING about it.
Ex. 3 He never said nothing. [Wrong] → He never said ANYTHING. / He said NOTHING.
RULE 13: When reporting speech, the reporting verb in past tense shifts the tense of the reported clause back by one step (backshift rule). Pronouns and time expressions also change accordingly.
Ex. 1 Direct: She said, 'I am happy.' → Indirect: She said that she WAS happy.
Ex. 2 Direct: He said, 'I will come tomorrow.' → Indirect: He said he WOULD come the NEXT DAY.
Ex. 3 Direct: 'We have finished the work.' → Indirect: They said they HAD FINISHED the work.
RULE 14: Words such as 'fewer' and 'less' are often confused. 'Fewer' is used for countable nouns; 'less' is used for uncountable nouns. Similarly, 'number' is for countable and 'amount/quantity' for uncountable.
Ex. 1 There are FEWER students this year. ('students' is countable)
Ex. 2 There is LESS water in the bottle. ('water' is uncountable)
Ex. 3 A LARGE NUMBER of errors were found. (not 'a large amount of errors')
RULE 15: Prepositions are fixed by collocation and idiom — they cannot be changed arbitrarily. Common error areas: 'differ from' (not 'differ with'), 'comply with', 'agree with/to/on', 'accuse of', 'apologise for', 'congratulate on'.
Ex. 1 She apologised FOR her mistake. (not 'apologised about')
Ex. 2 He was accused OF theft. (not 'accused for')
Ex. 3 The plan differs FROM the original. (not 'differs with')

❌ Common Student Errors — Correct vs. Incorrect

✗ INCORRECT✓ CORRECT
She don't know the answer.She doesn't know the answer.
The news are alarming.The news is alarming.
He is more smarter than his brother.He is smarter than his brother.
Neither of them are ready.Neither of them is ready.
I have visited Paris yesterday.I visited Paris yesterday.
The data is incomplete.The data are incomplete. (formal usage)
If I was you, I would resign.If I were you, I would resign.
He said that he will come.He said that he would come.
She is good in mathematics.She is good at mathematics.
She told me that she is tired.She told me that she was tired.
Each of the boys have a pen.Each of the boys has a pen.
The committee have decided.The committee has decided.
He is more elder than I.He is older than I.
I saw a unique one-eyed horse.I saw a unique horse with one eye. (avoid redundancy)
Between you and I, this is wrong.Between you and me, this is wrong.

📋 Rules Summary — Quick Revision Reference

  • 1
    Verb agrees with subject, not with intervening phrases. The quality of goods IS excellent.
  • 2
    With either/or and neither/nor, verb agrees with the nearer subject. Neither he nor they ARE wrong.
  • 3
    Indefinite pronouns (everyone, each, nobody) are always singular. Everyone HAS a role to play.
  • 4
    Past perfect (had + V3) for the earlier of two past events. She had left before he arrived.
  • 5
    Pronouns must agree with antecedent in number and gender. The jury gave ITS verdict.
  • 6
    Items in a series must be parallel in grammatical form. She likes reading, writing, and painting.
  • 7
    Modifiers must be placed adjacent to the word they modify. He eats only rice. (not 'He only eats rice.')
  • 8
    'An' before vowel sounds; 'a' before consonant sounds; 'the' for specific nouns. An hour; a university; the moon.
  • 9
    Correlative conjunctions link parallel grammatical elements. Not only brave but also WISE.
  • 10
    Compare like with like; use 'that of' / 'those of' for balanced comparisons. Her score is better than THAT OF her sister.
  • 11
    Conditionals have fixed tense combinations for Types 1, 2, and 3. If I were rich, I would travel.
  • 12
    Avoid double negatives; use only one negative per clause. I don't have ANYTHING. / I have NOTHING.
  • 13
    Backshift tenses in reported speech when the reporting verb is past. 'I am happy.' → He said he WAS happy.
  • 14
    'Fewer' for countable; 'less' for uncountable; 'number' vs. 'amount'. Fewer errors; less time; a number of mistakes.
  • 15
    Fixed collocations with prepositions must be memorised and applied exactly. Accused OF; apologised FOR; differ FROM.

🎯 Practice Questions — Part 1: All 60 Questions

🔍

Category 1 — Spot the Mistake

Q1 – Q15
Each sentence below contains one grammatical error. Identify the error, state the corrected version, and give a brief reason.
Q1. The committee have reached their decision after a long deliberation.
Q2. Neither the principal nor the teachers was present during the inspection.
Q3. He is one of those students who always complete their homework on time.
Q4. If she would have studied harder, she could have passed the examination.
Q5. The news about the accidents are disturbing the entire neighbourhood.
Q6. He told me that he will finish the project by the end of the week.
Q7. Between you and I, the decision was made without proper consultation.
Q8. She is married with a doctor who works in a government hospital.
Q9. Each of the boys have submitted their assignment before the deadline.
Q10. Not only the students but also the teacher were confused by the question.
Q11. He couldn't hardly believe what he had seen at the construction site.
Q12. The data shows that less people are enrolling in vocational courses this year.
Q13. Running down the stairs, the vase fell from the shelf and shattered.
Q14. She is more smarter than her elder sister who studies in the same class.
Q15. The accused was charged for fraud and was produced before the magistrate.
✏️

Category 2 — Fill in the Right Word

Q16 – Q30
Choose the most grammatically precise option to fill in the blank. More than one option may seem plausible — read carefully.
Q16. The jury _______ unable to reach a unanimous verdict after two days of deliberation.
A was
B were
C has been
D are being
Q17. If I _______ the prime minister, I would focus entirely on rural education.
A am
B was
C were
D had been
Q18. She told her students that honesty _______ the best policy.
A is
B was
C has been
D had been
Q19. The performance of the players _______ not met the expectations of the selectors.
A have
B has
C had
D were
Q20. He is the only one of the applicants who _______ qualified for the final round.
A have
B has
C are
D were
Q21. She requested that the manager _______ her application at the earliest.
A reviews
B review
C reviewed
D would review
Q22. No sooner had he left the room _______ the fire alarm went off.
A when
B then
C than
D as
Q23. The professor, along with his research associates, _______ presenting the paper tomorrow.
A are
B is
C were
D have been
Q24. She is not only a gifted artist but also _______ an accomplished musician.
A is being
B she is
C was
D an
Q25. The book which I borrowed from the library _______ already overdue.
A is
B are
C were
D have been
Q26. He ran _______ to catch the last bus before it pulled out of the station.
A fastly
B more fast
C faster
D fast
Q27. Had they informed us in advance, we _______ arranged an alternative venue.
A will have
B would have
C would
D had
Q28. The new policy applies to _______ employee who joined after January this year.
A all
B each
C every
D either
Q29. The two candidates differ widely _______ their approach to economic reform.
A with
B from
C in
D on
Q30. There were _______ errors in the final draft than in the preliminary version.
A less
B lesser
C fewer
D least
✅

Category 3 — Choose the Correct Sentence

Q31 – Q45
Only one of the four options is grammatically correct. Identify it and be prepared to explain why the remaining three are wrong.
Q31.
A He said me that he is going to the market.
B He told to me that he was going to the market.
C He told me that he was going to the market.
D He said to me that he is going to the market.
Q32.
A Neither of the two plans are acceptable to the board.
B Neither of the two plans is acceptable to the board.
C Neither of the two plans were acceptable to the board.
D Neither the two plans is acceptable to the board.
Q33.
A She is one of the best singer that has ever performed here.
B She is one of the best singers that have ever performed here.
C She is one of the best singers that has ever performed here.
D She is one of the best singer that have ever performed here.
Q34.
A The police has arrested three suspects in connection with the robbery.
B The police have arrested three suspects in connection with the robbery.
C The police is arresting three suspects in connection with the robbery.
D The police was arresting three suspects in the connection of the robbery.
Q35.
A If he would work harder, he would have succeeded in the interview.
B If he worked harder, he will succeed in the interview.
C If he works harder, he will succeed in the interview.
D If he works harder, he would succeed in the interview.
Q36.
A Hardly had she entered the hall when the lights went off.
B Hardly she had entered the hall when the lights went off.
C Hardly had she entered the hall than the lights went off.
D Hardly she entered the hall when the lights went off.
Q37.
A He is more efficient than any worker in the department.
B He is more efficient than any other worker in the department.
C He is most efficient than any worker in the department.
D He is more efficient than all other worker in the department.
Q38.
A The teacher, as well as the students, were thrilled with the results.
B The teacher, as well as the students, was thrilled with the results.
C The teacher as well as students were thrilled with the results.
D The teacher, as well as the students, have been thrilled with the results.
Q39.
A The number of accidents have increased sharply this monsoon season.
B A number of accidents has increased sharply this monsoon season.
C The number of accidents has increased sharply this monsoon season.
D A number of accidents have been increasing sharply this monsoon.
Q40.
A It was me who completed the task before the stipulated deadline.
B It was I who completed the task before the stipulated deadline.
C It was I who have completed the task before the stipulated deadline.
D It was me who have completed the task before the stipulated deadline.
Q41.
A She suggested me to apply for the position as soon as possible.
B She suggested that I apply for the position as soon as possible.
C She suggested me that I should apply for the position as soon as possible.
D She suggested me applying for the position as soon as possible.
Q42.
A The minister, together with his advisors, were present at the summit.
B The minister together with his advisors was present at the summit.
C The minister, together with his advisors, was present at the summit.
D The minister together with his advisors were present at the summit.
Q43.
A She is very unique in her style of communicating complex ideas.
B She is quite unique in her style of communicating complex ideas.
C She is unique in her style of communicating complex ideas.
D She is more unique in her style of communicating complex ideas.
Q44.
A Each student along with their parents were called to the principal's office.
B Each student along with their parents was called to the principal's office.
C Each student along with his or her parents were called to the principal's office.
D Each student along with his or her parents was called to the principal's office.
Q45.
A No sooner did he open the door than the cat rushed inside.
B No sooner did he open the door when the cat rushed inside.
C No sooner he opened the door than the cat rushed inside.
D No sooner had he opened the door when the cat rushed inside.
🧠

Category 4 — Analyse, Rewrite & Explain

Q46 – Q60
These questions require deep grammatical analysis, clause identification, rewriting for accuracy and clarity, and evaluating competing rules. Write full answers with reasoning.
Q46. Identify all grammatical errors in the following passage and rewrite it correctly: 'The team of researchers have submitted their report to the committee. Neither of the findings were conclusive, but the data suggests that less people are affected than previously thought. The principal reason being the new guidelines which was introduced last year.'
Q47. Rewrite the following sentence in three different conditional forms (Type 1, Type 2, and Type 3) and label each: 'Study hard and you will succeed.'
Q48. The following sentence contains a structural ambiguity due to a misplaced modifier. Identify the ambiguity, explain it, and provide two possible rewritten versions that resolve it: 'The detective observed the suspect with binoculars.'
Q49. Convert the following direct speech sentences into indirect speech, applying all backshift and time-expression rules: (a) She said, 'I have been waiting for you since morning.' (b) He said, 'I will meet you here tomorrow.' (c) They said, 'We did not attend the meeting yesterday.'
Q50. Identify the error type (parallelism, agreement, modifier, tense, or comparison) in each sentence and correct it: (a) She likes to swim, cycling, and to run every morning. (b) The report of the inspectors are ready for submission. (c) He drives more carefully than any driver I know. (d) Walking into the room, the furniture appeared dusty. (e) The temperature today is hotter than yesterday.
Q51. Explain the grammatical difference between the following three sentences and when each is appropriate: (a) 'She may leave early.' (b) 'She might leave early.' (c) 'She could leave early.'
Q52. Rewrite the following poorly structured paragraph to improve subject-verb agreement, tense consistency, and parallelism. Do not change the meaning: 'Every student in the class were given a form. They have to fill it and returning it before Friday. The teacher, along with the monitors, were checking the submissions carefully.'
Q53. Identify and correct the pronoun reference errors in the following sentences: (a) The manager told the assistant that he would be promoted. (b) When Priya met Meena, she was very nervous. (c) If anyone loses their card, they should report to the front desk immediately. (d) The committee announced their decision to the press.
Q54. The following sentence is grammatically correct but stylistically ambiguous. Explain the ambiguity and rewrite it for precision: 'I saw the man on the hill with a telescope.'
Q55. Explain with examples why the following sentences are incorrect. Provide the correct version and name the rule being violated: (a) He could not but help laughing. (b) The reason is because she refused to comply. (c) She returned back to the office after lunch. (d) He is the most tallest boy in the class. (e) She is more better at grammar than her peers.
Q56. Compare and contrast the use of 'since', 'for', 'ago', and 'before' in perfect tenses. Write one original sentence each that demonstrates correct usage, and one incorrect sentence for each with explanation.
Q57. The following sentence uses the subjunctive mood. Identify the subjunctive, explain its meaning, and write three more sentences that correctly use the subjunctive: 'The judge insisted that the witness tell the truth.'
Q58. Analyse the following sentence for all possible grammatical issues. List each issue separately with the rule violated and provide a fully corrected version: 'Each of the five students have submitted their project that was assigned by the teacher last week, but neither of the evaluators have reviewed it yet.'
Q59. Rewrite the following active voice sentences in passive voice and the passive voice sentences in active voice. Comment on whether the voice change alters the emphasis: (a) The board rejected the proposal unanimously. (b) Strict measures are being taken by the authorities to curb the menace. (c) The engineer completed the design in three days.
Q60. Two grammar rules appear to conflict in the following sentence. Identify both rules, explain the conflict, state which rule takes priority, and write the corrected sentence: 'A group of highly qualified engineers and architects have designed the new airport.'

💡 Practice Questions — Part 2: Detailed Answers

Category 1 — Spot the Mistake: Answers (Q1–Q15)
AnswerError: 'have reached their decision' — 'committee' is a collective noun treated as singular in formal written English. Corrected: 'The committee HAS reached ITS decision after a long deliberation.' Rule: Collective nouns (committee, jury, team, board) take singular verbs and singular pronouns when acting as a unified body.
AnswerError: 'was present' — With 'neither...nor', the verb must agree with the nearer subject, which is 'the teachers' (plural). Corrected: 'Neither the principal nor the teachers WERE present during the inspection.' Rule: Nearer-subject agreement with correlative conjunctions.
AnswerError: 'complete their homework' — The subject of the relative clause is 'who', which refers to 'those students' (plural). The verb should be plural. However, the sentence is actually correct as written. Checking again: 'one of those students who always complete' — 'who' refers to 'those students' (plural), so 'complete' (plural) is correct. Corrected: The sentence is grammatically correct as written. Many students incorrectly write 'completes', treating 'who' as referring to 'one', but 'who' refers to 'those students'. No correction needed.
AnswerError: 'If she would have studied' — 'would have' cannot be used in the if-clause of a Type 3 conditional. The if-clause requires past perfect. Corrected: 'If she HAD STUDIED harder, she could have passed the examination.' Rule: Type 3 conditional — If + past perfect, would have + past participle.
AnswerError: 'are disturbing' — The subject is 'The news', which is an uncountable noun and always takes a singular verb. Corrected: 'The news about the accidents IS disturbing the entire neighbourhood.' Rule: 'News' is always singular despite appearing plural in form.
AnswerError: 'will finish' — When the reporting verb is in the past tense ('told'), the tense in the reported clause must backshift. 'Will' becomes 'would'. Corrected: 'He told me that he WOULD FINISH the project by the end of the week.' Rule: Backshift in reported speech.
AnswerError: 'Between you and I' — 'Between' is a preposition and must be followed by objective case pronouns. 'I' is nominative; it should be 'me'. Corrected: 'Between you and ME, the decision was made without proper consultation.' Rule: Prepositions are followed by objective case (me, him, her, us, them).
AnswerError: 'married with' — The correct preposition with 'married' is 'to', not 'with'. Corrected: 'She is married TO a doctor who works in a government hospital.' Rule: Fixed collocation — 'married to' (not 'married with').
AnswerError: 'have submitted' — 'Each' is an indefinite pronoun that is always singular. The verb must be singular. Corrected: 'Each of the boys HAS submitted his assignment before the deadline.' Rule: Indefinite pronoun 'each' takes a singular verb.
AnswerError: 'were confused' — With 'not only...but also', the verb agrees with the subject nearest to it. Here, the nearer subject is 'the teacher' (singular), so the verb should be singular. Corrected: 'Not only the students but also the teacher WAS confused by the question.' Rule: Nearer-subject agreement with correlative conjunctions.
AnswerError: 'couldn't hardly' — This is a double negative. 'Couldn't' and 'hardly' together create an illogical double negation. Corrected: 'He could HARDLY believe what he had seen.' OR 'He couldn't BELIEVE what he had seen.' Rule: Avoid double negatives in formal English; 'hardly', 'scarcely', 'barely' are themselves negative in meaning.
AnswerError: 'less people' — 'People' is a countable noun. 'Fewer' must be used with countable nouns; 'less' is reserved for uncountable nouns. Corrected: 'The data shows that FEWER people are enrolling in vocational courses this year.' Rule: Fewer = countable; Less = uncountable.
AnswerError: Dangling modifier — 'Running down the stairs' has no logical subject in the main clause. The vase cannot run. Corrected: 'Running down the stairs, SHE KNOCKED the vase from the shelf and it shattered.' OR 'As she ran down the stairs, the vase fell from the shelf and shattered.' Rule: Introductory participial phrases must logically refer to the grammatical subject of the main clause.
AnswerError: 'more smarter' — 'Smarter' is already the comparative form of 'smart'. Adding 'more' creates a double comparative. Corrected: 'She is SMARTER than her elder sister who studies in the same class.' Rule: Never use 'more' with the -er comparative form.
AnswerError: 'charged for fraud' — The correct collocation is 'charged WITH', not 'charged for'. Corrected: 'The accused was charged WITH fraud and was produced before the magistrate.' Rule: Fixed legal collocation — 'charge someone WITH an offence'.
Category 2 — Fill in the Right Word: Answers (Q16–Q30)
Answer: (A) was'Jury' is a collective noun treated as a singular entity when all members act together in reaching a decision. (B) 'were' — incorrect; treats jury as plural. (C) 'has been' — present perfect, but the context demands simple past. (D) 'are being' — present continuous, wrong tense entirely.
Answer: (C) wereThis is a Type 2 conditional with a hypothetical present situation. The subjunctive 'were' is required after 'If I' regardless of number. (A) 'am' — makes it factual, not hypothetical. (B) 'was' — grammatically inferior; 'were' is the formal/correct subjunctive. (D) 'had been' — shifts it to Type 3 (impossible past), which changes the meaning entirely.
Answer: (A) isWhen the reported clause states a universal truth, scientific fact, or habitual fact, the present tense is retained regardless of the reporting verb's tense. Honesty being the best policy is a proverbial truth. (B) 'was' — technically acceptable in strict grammatical backshift, but (A) is more accurate for universal truths. (C) and (D) — perfect tenses are inappropriate here.
Answer: (B) hasThe subject is 'The performance' (singular), not 'the players'. Intervening prepositional phrases do not affect verb agreement. (A) 'have' — wrongly agrees with 'players'. (C) 'had' — past perfect, wrong tense. (D) 'were' — plural, incorrect.
Answer: (B) hasThe subject of the relative clause 'who' refers to 'the only one' (singular), not to 'the applicants'. When 'one' is preceded by 'the only', the verb must be singular. Compare: 'one of those who have qualified' (plural) vs. 'the only one who has qualified' (singular). (A), (C), (D) — all plural or wrong form.
Answer: (B) reviewAfter verbs of suggestion, recommendation, demand, and insistence, the subjunctive bare infinitive is used. 'Requested that the manager review' is the correct subjunctive structure. (A) 'reviews' — indicative, not subjunctive. (C) 'reviewed' — past tense, incorrect. (D) 'would review' — modal, not used in subjunctive clauses of this type.
Answer: (C) than'No sooner...than' is a fixed correlative expression. It follows the pattern: 'No sooner had + subject + V3 + THAN + past simple.' (A) 'when' — used with 'hardly' and 'scarcely', not 'no sooner'. (B) 'then' — incorrect conjunction in this context. (D) 'as' — does not collocate with 'no sooner'.
Answer: (B) isThe subject is 'The professor' (singular). Phrases introduced by 'along with', 'together with', 'as well as', 'in addition to' are parenthetical — they do not change the number of the main subject. (A) 'are' — treats the added phrase as a co-subject. (C) 'were' — wrong tense. (D) 'have been' — present perfect, wrong context.
Answer: (D) anThe structure 'not only...but also' requires parallel grammatical elements. 'She is not only A GIFTED ARTIST but also AN ACCOMPLISHED MUSICIAN' — both are noun phrases. Inserting 'an' makes the second element parallel. (A), (B), (C) — all introduce verbs or clauses, breaking parallelism.
Answer: (A) isThe subject is 'The book' (singular). The relative clause 'which I borrowed from the library' does not change the subject's number. (B) 'are' — plural. (C) 'were' — past tense, not suitable for a present situation. (D) 'have been' — plural auxiliary.
Answer: (D) fast'Fast' functions as both adjective and adverb — no '-ly' suffix. (A) 'fastly' — does not exist in English. (B) 'more fast' — incorrect comparative form; 'faster' is the correct comparative. (C) 'faster' — implies comparison with something else, which is not expressed here.
Answer: (B) would haveThe sentence uses an inverted Type 3 conditional ('Had they informed us'). The result clause must use 'would have + past participle'. (A) 'will have' — future perfect, wrong. (C) 'would' — omits 'have', making it Type 2 instead of Type 3. (D) 'had' — past tense, incorrect in the result clause.
Answer: (C) every'Every employee' is idiomatic — 'every' applies collectively to individuals. 'Each' tends to emphasise individuality and is less natural before a singular noun in this construction. 'All' requires a plural noun. 'Either' applies to one of two choices. 'every employee who joined' is the most natural and grammatically precise choice.
Answer: (C) in'Differ in' is used when the point of difference is specified (their approach). 'Differ from' is used when contrasting two different things as wholes. 'Differ with' means to disagree. 'Differ on' refers to disagreement on a specific issue. Here, the candidates' difference is described within a specific domain (approach to reform), so 'in' is correct.
Answer: (C) fewer'Errors' is a countable noun and requires 'fewer'. (A) 'less' — for uncountable nouns only. (B) 'lesser' — an adjective meaning 'of lower rank or importance', not a quantifier. (D) 'least' — superlative, applicable when comparing three or more in absolute terms, not two versions here.
Category 3 — Choose the Correct Sentence: Answers (Q31–Q45)
Answer: (C)'Tell' takes an indirect object: 'told me'. The tense backshifts from 'is' to 'was' since the reporting verb is past. (A) 'said me' — 'say' does not take an indirect object without 'to'; also tense error. (B) 'told to me' — 'told' never takes 'to' before the indirect object. (D) 'said to me that he is going' — tense error; backshift required.
Answer: (B)'Neither of' takes a singular verb when used formally. 'Neither of the two plans IS acceptable.' (A) 'are acceptable' — plural verb with 'neither of', incorrect in formal usage. (C) 'were acceptable' — past tense and plural. (D) 'Neither the two plans' — incorrect; 'neither of' requires 'of' before the noun phrase.
Answer: (B)In 'one of the best singers that have ever performed', 'that' (relative pronoun) refers to 'singers' (plural), so the verb is plural 'have'. (A) 'singer...has' — both errors: 'singer' should be plural; 'has' would be used only with 'the only one'. (C) 'singers...has' — subject of relative clause is 'singers', so 'has' is wrong. (D) 'singer...have' — 'singer' is wrong (should be plural).
Answer: (B)'Police' is a collective noun that refers to multiple officers and always takes a plural verb. (A) 'has arrested' — singular verb, incorrect for 'police'. (C) 'is arresting' — singular. (D) 'was arresting...in the connection of' — singular verb and wrong preposition; 'in connection with' is the correct phrase.
Answer: (C)A Type 1 conditional (real, possible condition): If + present simple, will + base form. 'If he works harder, he will succeed.' (A) 'would have' in the result clause of an 'if he would work' construction — double error. (B) 'worked...will succeed' — mixes Type 2 and Type 1. (D) 'works...would succeed' — mixes Type 1 and Type 2.
Answer: (A)'Hardly...when' is the correct fixed expression: subject-auxiliary inversion after 'Hardly had she entered'. (B) 'Hardly she had entered' — no inversion, wrong. (C) 'Hardly had she entered...than' — 'than' is for 'No sooner', not 'Hardly'. (D) 'Hardly she entered' — no inversion and wrong past tense.
Answer: (B)When comparing one member of a group with others, 'any other' prevents comparing a person to themselves: 'more efficient than any OTHER worker.' (A) 'than any worker' — includes himself, making the comparison illogical. (C) 'most efficient than' — 'most' is superlative and not used with 'than'. (D) 'all other worker' — 'worker' should be plural, and 'all other' with comparative is unusual.
Answer: (B)'As well as' is a parenthetical addition, not a true conjunction — it does not change the subject. The subject remains 'The teacher' (singular), requiring 'was'. (A) 'were thrilled' — plural verb, incorrect. (C) 'teacher as well as students' — missing commas making it appear compound; also 'were' is plural. (D) 'have been' — plural and present perfect, both wrong.
Answer: (C)'The number of' is a fixed phrase that takes a singular verb ('has increased'). (A) 'The number of accidents have' — 'number' is the head noun, singular. (B) 'A number of accidents has' — 'A number of' acts like 'many' and takes a plural verb ('have'). (D) 'A number of accidents have been increasing' — 'have' is right for 'a number of', but 'have been increasing' changes meaning unnecessarily.
Answer: (B)In 'It is/was I/me' constructions, formal grammar requires the nominative 'I' after the linking verb 'was'. (A) and (D) 'It was me' — informal/colloquial but technically incorrect in formal grammar. (C) 'It was I who have completed' — 'have completed' is present perfect; but the context is past, so 'completed' is correct. (B) uses simple past correctly.
Answer: (B)'Suggest' cannot be followed by an indirect object + infinitive. 'Suggest that I apply' — using bare subjunctive — is correct. (A) 'suggested me to apply' — 'suggest' does not take 'object + infinitive'. (C) 'suggested me that I should' — 'suggest' takes no indirect object. (D) 'suggested me applying' — again, no indirect object permitted with 'suggest'.
Answer: (C)'Together with' is a parenthetical phrase set off by commas. The main subject is 'The minister' (singular), so the verb is 'was'. Commas are required around the parenthetical phrase. (A) 'were present' — plural. (B) Missing commas; without commas 'together with' could be parsed as joining two subjects. (D) 'were present' — plural, wrong.
Answer: (C)'Unique' is an absolute adjective — it means one of a kind and cannot be modified by degree adverbs. It cannot be 'very unique', 'quite unique', or 'more unique'. (A) 'very unique' — wrong; unique is absolute. (B) 'quite unique' — wrong for the same reason. (D) 'more unique' — superlative modification of an absolute adjective is incorrect.
Answer: (D)'Each student' is singular, requiring a singular verb ('was called'). 'Along with his or her parents' is parenthetical and does not change the subject's number. 'His or her' is the grammatically precise pronoun for 'each student'. (A) 'their parents were called' — 'their' is informal for 'each'; 'were' is plural. (B) 'their parents was called' — 'their' is grammatically imprecise. (C) 'his or her parents were called' — verb 'were' is plural, wrong.
Answer: (A)'No sooner did he open the door THAN the cat rushed inside.' The structure requires: No sooner + inverted auxiliary + subject + V + THAN + past simple. (B) 'when' — 'when' is used with 'hardly/scarcely', not 'no sooner'. (C) 'No sooner he opened' — missing inversion (auxiliary must come before subject). (D) 'No sooner had he opened...when' — 'than' is required, not 'when'; 'had' changes tense unnecessarily.
Category 4 — Analyse, Rewrite & Explain: Answers (Q46–Q60)
AnswerErrors identified: (1) 'have submitted their report' — 'team' is collective, singular: should be 'has submitted its report'. (2) 'Neither of the findings were conclusive' — 'neither of' takes singular verb: 'was conclusive'. (3) 'less people' — 'people' is countable: 'fewer people'. (4) 'which was introduced' — the antecedent 'guidelines' is plural: 'which were introduced'. (5) 'The principal reason being' — fragment; 'being' should be 'was'.

Corrected: 'The team of researchers has submitted its report to the committee. Neither of the findings was conclusive, but the data suggests that fewer people are affected than previously thought. The principal reason was the new guidelines which were introduced last year.'
AnswerOriginal: 'Study hard and you will succeed.'

Type 1 (Real/Possible Condition): 'If you study hard, you will succeed.' — Present simple in if-clause; will + base in result clause. Expresses a realistic, achievable condition.

Type 2 (Hypothetical Present/Future): 'If you studied hard, you would succeed.' — Past simple in if-clause; would + base in result clause. Implies the speaker doubts the condition is being fulfilled.

Type 3 (Impossible Past): 'If you had studied hard, you would have succeeded.' — Past perfect in if-clause; would have + past participle in result clause. Refers to an unfulfilled condition in the past, expressing regret.
AnswerAmbiguity: The phrase 'with binoculars' can attach to either 'observed' (the detective used binoculars to observe) or 'the suspect' (the suspect was carrying binoculars). Both readings are grammatically possible.

Interpretation 1: The detective used binoculars to observe the suspect. Rewrite: 'Using binoculars, the detective observed the suspect.' OR 'The detective observed the suspect through binoculars.'

Interpretation 2: The detective observed the suspect who had binoculars. Rewrite: 'The detective observed the suspect who was carrying binoculars.' OR 'The detective observed the suspect, who had binoculars.'

Rule violated: Misplaced modifier — the prepositional phrase must be placed immediately adjacent to the noun or verb it modifies.
Answer(a) Direct: 'I have been waiting for you since morning.' → Indirect: She said that she HAD BEEN WAITING for him/her SINCE MORNING. [Present perfect continuous → past perfect continuous; 'I' → 'she'; 'you' → 'him/her'; 'morning' remains as time expressions with 'since' are often retained]

(b) Direct: 'I will meet you here tomorrow.' → Indirect: He said that he WOULD MEET her/him THERE THE NEXT DAY. ['will' → 'would'; 'I' → 'he'; 'you' → 'her/him'; 'here' → 'there'; 'tomorrow' → 'the next day']

(c) Direct: 'We did not attend the meeting yesterday.' → Indirect: They said that they HAD NOT ATTENDED the meeting THE DAY BEFORE / THE PREVIOUS DAY. ['did not' → 'had not' (past → past perfect); 'we' → 'they'; 'yesterday' → 'the day before'/'the previous day']
Answer(a) Error type: Parallelism. 'To swim, cycling, and to run' mixes infinitives and gerund. Corrected: 'She likes swimming, cycling, and running every morning.' (all gerunds — parallel)

(b) Error type: Subject-Verb Agreement. Subject is 'The report' (singular), not 'inspectors'. Corrected: 'The report of the inspectors IS ready for submission.'

(c) Error type: Comparison. 'Than any driver' includes himself in the comparison. Corrected: 'He drives more carefully than any OTHER driver I know.'

(d) Error type: Dangling modifier. 'Walking into the room' has no logical subject in the main clause. Corrected: 'Walking into the room, HE NOTICED the furniture appeared dusty.' OR 'As they walked into the room, the furniture appeared dusty.'

(e) Error type: Comparison of like items / double comparative. 'Hotter than yesterday' compares temperature to a day (unlike items). Corrected: 'The temperature today is higher than THAT OF yesterday.' OR 'Today is hotter than yesterday.' (if comparing the days themselves)
Answer(a) 'She may leave early.' — 'May' expresses possibility (about 50% likelihood) or formal permission. Used when the speaker is uncertain but not dismissing the possibility.

(b) 'She might leave early.' — 'Might' expresses a more remote or tentative possibility (lower probability than 'may'). Often suggests doubt, or is used in hypothetical/conditional contexts.

(c) 'She could leave early.' — 'Could' expresses ability, a conditional possibility, or a suggestion. It is the past form of 'can' but is used for polite possibility in present/future contexts. Example: She could leave early if her supervisor agrees (conditional ability/permission).

Key distinction: May > Might in probability; Could emphasises conditional ability. In formal grammar, 'may' is for permission; 'can' is informal for permission.
AnswerOriginal: 'Every student in the class were given a form. They have to fill it and returning it before Friday. The teacher, along with the monitors, were checking the submissions carefully.'

Errors: (1) 'Every student...were' — 'every' makes subject singular; should be 'was'. (2) 'They have to fill it and returning it' — tense inconsistency and parallelism error; should be 'had to fill it and return it'. (3) 'The teacher...were checking' — 'along with' is parenthetical; subject is 'The teacher' (singular); should be 'was checking'.

Corrected: 'Every student in the class was given a form. They had to fill it and return it before Friday. The teacher, along with the monitors, was checking the submissions carefully.'
Answer(a) 'The manager told the assistant that he would be promoted.' — Ambiguous: 'he' could refer to either the manager or the assistant. Corrected: 'The manager told the assistant, "You will be promoted."' OR 'The manager informed the assistant of the assistant's promotion.'

(b) 'When Priya met Meena, she was very nervous.' — 'she' is ambiguous — could be Priya or Meena. Corrected: 'When Priya met Meena, PRIYA was very nervous.' OR 'MEENA was very nervous when Priya met her.'

(c) 'If anyone loses their card, they should report to the front desk.' — Formal grammar requires 'his or her...he or she', though 'they/their' is increasingly accepted. In formal written English: 'If anyone loses his or her card, he or she should report to the front desk.'

(d) 'The committee announced their decision.' — 'Committee' as a unified body takes singular pronoun: 'The committee announced ITS decision.' Rule: Collective nouns acting in unison take singular pronouns.
AnswerSentence: 'I saw the man on the hill with a telescope.'

Ambiguity: The phrase 'with a telescope' can modify 'saw' (I used a telescope to see), 'the man' (the man was carrying a telescope), or 'on the hill' (the telescope was on the hill).

Three interpretations: (1) I used a telescope to see the man on the hill. (2) I saw the man who was on the hill and who had a telescope. (3) I saw the man on the hill, which had a telescope on it.

Rewritten for precision: Interpretation 1: 'Through a telescope, I saw the man on the hill.' Interpretation 2: 'I saw the man with a telescope standing on the hill.'

Lesson: Prepositional phrases must be placed immediately after the element they modify to eliminate ambiguity.
Answer(a) 'He could not but help laughing.' — Error: 'Cannot but' and 'cannot help' are two separate idioms fused together. Corrected: 'He could not help LAUGHING.' OR 'He could not but LAUGH.' Rule: Do not mix two idiomatic structures.

(b) 'The reason is because...' — Error: 'Because' introduces a clause of cause; 'reason' already implies cause, making 'because' redundant. Corrected: 'The reason is THAT she refused to comply.' Rule: Avoid 'reason is because'; use 'reason is that'.

(c) 'She returned back to the office.' — Error: 'Returned' already implies going back; 'back' is redundant. Corrected: 'She RETURNED to the office after lunch.' Rule: Avoid tautology/redundancy.

(d) 'He is the most tallest boy.' — Error: Double superlative — 'tallest' is already superlative; adding 'most' is wrong. Corrected: 'He is THE TALLEST boy in the class.' Rule: Never use 'most' with -est superlative form.

(e) 'She is more better at grammar.' — Error: Double comparative — 'better' is already the comparative of 'good'. Corrected: 'She is BETTER at grammar than her peers.' Rule: Never use 'more' with -er comparative form.
AnswerSINCE: Used with a specific point in time; always with perfect tenses. Correct: 'She has worked here since 2018.' Incorrect: 'She works here since 2018.' (Error: present simple cannot be used with 'since' for ongoing actions)

FOR: Used with a duration of time; compatible with all perfect tenses. Correct: 'He has been studying for three hours.' Incorrect: 'He has been studying since three hours.' (Error: 'since' requires a point in time, not a duration)

AGO: Used only with simple past; marks time measured back from now. Correct: 'She left two days ago.' Incorrect: 'She has left two days ago.' (Error: 'ago' cannot be used with present perfect; use simple past)

BEFORE: Used with past perfect for an action that preceded another past action. Correct: 'He had finished the work before she arrived.' Incorrect: 'He finished the work before she has arrived.' (Error: 'has arrived' is present perfect; must be simple past or past perfect for a past context)
AnswerSubjunctive identified: 'tell' — this is the present subjunctive (base form of the verb, without -s even though 'the witness' is third-person singular). In indicative mood, it would be 'tells'. The subjunctive here expresses a wish, requirement, or demand rather than a factual statement.

Meaning: The judge demanded/required the witness to tell the truth. The subjunctive signals urgency, formality, and obligation.

Three additional correct subjunctive sentences:
(1) 'The board recommended that each member SIGN the agreement personally.' (not 'signs')
(2) 'It is essential that every candidate SUBMIT their entry before noon.' (not 'submits')
(3) 'If I WERE the manager, I would implement stricter protocols.' (hypothetical/counterfactual — 'were' for all persons)

Verbs commonly triggering subjunctive: suggest, recommend, insist, demand, require, propose, request, order.
AnswerSentence: 'Each of the five students have submitted their project that was assigned by the teacher last week, but neither of the evaluators have reviewed it yet.'

Issue 1 — Subject-Verb Agreement (Rule 3): 'Each...have' — 'each' is singular → 'has submitted'. Issue 2 — Pronoun Agreement (Rule 5): 'their project' — 'each' is singular → 'his or her project'. Issue 3 — Subject-Verb Agreement (Rule 3): 'neither of the evaluators have' — 'neither of' takes singular → 'has reviewed'.

Corrected: 'Each of the five students HAS submitted HIS OR HER project that was assigned by the teacher last week, but neither of the evaluators HAS reviewed it yet.'

Note: The relative clause 'that was assigned by the teacher last week' is correctly formed (singular 'project' → singular 'was'). No error there.
Answer(a) Active: 'The board rejected the proposal unanimously.' → Passive: 'The proposal was rejected unanimously by the board.' Comment: The passive shifts emphasis from the board (actor) to the proposal (the thing rejected). If the focus is on what happened to the proposal, passive is more effective.

(b) Passive: 'Strict measures are being taken by the authorities to curb the menace.' → Active: 'The authorities are taking strict measures to curb the menace.' Comment: The active voice is more direct and vigorous. The passive here de-emphasises the authorities as agents, focusing on the action.

(c) Active: 'The engineer completed the design in three days.' → Passive: 'The design was completed by the engineer in three days.' Comment: The passive here shifts focus to the design (the result). If the engineer's identity is already known or unimportant, the passive is preferred. The active voice is more concise and direct.
AnswerSentence: 'A group of highly qualified engineers and architects have designed the new airport.'

Rule 1 — Collective Noun Agreement: 'A group' is a collective noun, typically singular. This suggests the verb should be 'has designed'.

Rule 2 — Notional Concord: When the members of a collective noun are multiple, distinct individuals working together (engineers AND architects — two professions), notional concord allows a plural verb. 'Have designed' acknowledges the plurality of individuals involved.

Conflict: Formal grammatical agreement (singular 'group') vs. notional concord (plural members from two professions).

Which rule takes priority: In formal written English, grammatical agreement with the head noun ('group') generally takes priority. Corrected (formal): 'A group of highly qualified engineers and architects HAS designed the new airport.' However, in British English, notional concord with 'have' is widely accepted and not considered an error.

Conclusion: In formal examinations and standard written English, 'has' is the preferred choice. 'Have' reflects informal or British notional agreement.

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