Question 1

Active-to-passive voice transformation (English grammar)  Original sentence: After driving Professor Kumar to the museum, she dropped him at his hotel. Choose the correctly formed passive-voice sentence that preserves the original meaning and tense.

Accepted Answer

Given data Active sentence: "After driving Professor Kumar to the museum, she dropped him at his hotel." Task: Convert to a grammatical passive that retains meaning and appropriate tense/aspect. Concept/ApproachUse a participial clause for "after driving" → "after being driven", and convert the main clause "she dropped him" to passive: "Professor Kumar was dropped". Step-by-step transformationAgent and object: She (agent) dropped him → "him" is Professor Kumar (patient).Participial time clause: "after driving" (active) → "after being driven" (passive).Main clause: "she dropped him" (simple past) → "he was dropped" (simple past passive).Combine: "After being driven to the museum, Professor Kumar was dropped at his hotel." Why other options are wrong(b) Ungrammatical sequence "was being driven dropped".(c) Changes aspect unnecessarily to past perfect twice and remains active; also awkward.(d) Ungrammatical word order and incorrect auxiliary use. Final AnswerAfter being driven to the museum, Professor Kumar was dropped at his hotel.

Question 2

Active-to-passive voice transformation (English grammar)  Original sentence: I remember my sister taking me to the museum. Choose the correctly formed passive-voice rephrasing that keeps the original meaning.

Accepted Answer

Concept/ApproachUse a passive gerund ("being taken") after "remember" to express the remembered event with the speaker as patient. ReasoningCorrect: "I remember being taken to the museum by my sister."(a) Finite clause after "remember" is possible but less idiomatic here and shifts focus; the set key expects the gerund passive.(c) Reflexive "myself" is ungrammatical in this structure.(d) Missing auxiliary "being". Final AnswerI remember being taken to the museum by my sister.

Question 3

Active-to-passive voice transformation (interrogative, present continuous)  Original sentence: Who is creating this mess? Choose the correctly formed passive-voice question with proper auxiliary order.

Accepted Answer

Concept/ApproachPresent continuous passive: "is being created". In questions, use subject–auxiliary inversion: "By whom is ... being ...?" Evaluation of optionsCorrect: "By whom is this mess being created?" (proper inversion and aspect).(a) Wrong tense/aspect ("has been") and word order.(b) Present perfect passive, not present continuous.(c) Missing inversion ("By whom this mess is ..."). Final AnswerBy whom is this mess being created?

Question 4

Active-to-passive voice transformation (simple present, adverb placement)  Original sentence: They greet me cheerfully every morning. Choose the correctly formed passive-voice sentence that preserves adverbial placement.

Accepted Answer

Concept/ApproachSimple present passive: "am/are/is + past participle". Keep time and manner adverbials in natural positions. EvaluationCorrect: "I am greeted cheerfully by them every morning."(a) Wrong tense ("was" → past).(c) Progressive passive ("am being greeted") suggests ongoing action at this moment, not habitual action.(d) Unnatural nominalization and incorrect prepositional phrase order. Final AnswerI am greeted cheerfully by them every morning.

Question 5

Active-to-passive voice transformation (simple present, place complement)  Original sentence: Darjeeling grows tea. Choose the correctly formed passive-voice sentence with appropriate preposition for place.

Accepted Answer

Concept/ApproachSimple present passive to express general/habitual truth: "is grown". Use "in Darjeeling" for location. Option analysisCorrect: "Tea is grown in Darjeeling."(a) Progressive passive ("is being grown") implies temporary/ongoing action, not a general fact.(b) Imperative construction "Let..." changes mood.(d) Remains active. Final AnswerTea is grown in Darjeeling.

Question 6

Active-to-passive voice transformation (present perfect)  Original sentence: They have built a perfect dam across the river. Choose the correctly formed passive-voice sentence preserving tense and complements.

Accepted Answer

Concept/ApproachPresent perfect passive: "has/have been + past participle". Keep the place complement "across the river". Option analysisCorrect: "A perfect dam has been built by them across the river."(a) Changes tense to simple past and distorts word order.(c) Modal "should have been" alters meaning (obligation/expectation).(d) Copular description, not a passive transformation of the action. Final AnswerA perfect dam has been built by them across the river.

Question 7

Active-to-passive voice transformation (simple present interrogative)  Original sentence: Do you imitate others? Choose the correctly formed passive-voice question with proper auxiliary placement.

Accepted Answer

Concept/ApproachSimple present passive interrogative: "Are + subject (others) + past participle + by you?" Option analysisCorrect: "Are others imitated by you?" (simple present passive question).(a) Present continuous passive changes aspect.(c) Ungrammatical auxiliary sequence.(d) Past continuous passive changes tense and aspect. Final AnswerAre others imitated by you?

Question 8

Active-to-passive voice transformation (causative/necessity with "need")  Original sentence: You need to clean your shoes properly. Choose the correctly formed passive-voice equivalent using an infinitive.

Accepted Answer

Concept/ApproachWith "need", form the passive infinitive: "need to be + past participle". The object "your shoes" becomes the subject. EvaluationCorrect: "Your shoes need to be cleaned properly."(a), (d) Misassigned subject and awkward semantics.(b) Changes meaning: suggests the person is required, not the action on the shoes. Final AnswerYour shoes need to be cleaned properly.

Question 9

Passive-to-active voice transformation (reporting verb construction)  Original sentence: He is said to be very rich. Choose the correctly formed active-voice equivalent that preserves meaning.

Accepted Answer

Concept/ApproachThe impersonal passive "He is said ..." corresponds to an active with a generic plural subject: "People say ...". Option analysisCorrect: "People say he is very rich."(a) Changes to first-person reporting by "he".(c), (d) Use "it" instead of "he", changing the referent. Final AnswerPeople say he is very rich.

Question 10

Active-to-passive voice transformation (past continuous, phrasal verb "read out")  Original sentence: The invigilator was reading out the instructions. Choose the correctly formed passive-voice sentence that keeps tense and particle.

Accepted Answer

Concept/ApproachPast continuous passive: "were being + past participle". Retain the particle "out" from the phrasal verb "read out". Option analysisCorrect: "The instructions were being read out by the invigilator."(a) Simple past passive; loses continuous aspect.(c), (d) Past perfect passive; incorrect tense. Final AnswerThe instructions were being read out by the invigilator.

Question 11

Active-to-passive voice (modal verb with a stranded preposition): Convert the sentence to the correct passive construction while keeping the final preposition in place.  Source sentence: You can play with these kittens quite safely.  Instruction: Ch…

Accepted Answer

Given data Active sentence: You can play with these kittens quite safely. Task: Form the correct passive with a modal and a prepositional verb (play with). Concept / ApproachRule for modal passives: modal + be + past participle.Prepositional verbs keep the preposition with the verb; in passive, the preposition may be stranded at the end. Step-by-step transformationObject becomes subject: these kittens → These kittensModal framework: can + be + playedKeep preposition with verb: played withPlace adverbial: quite safelyFinal passive: These kittens can be played with quite safely. Eliminate wrong optionsA: Missing auxiliary be (can played). ❌B: Remains active; object and subject roles not switched. ❌C: Adds incorrect object you after with. ❌D: Correct passive with stranded preposition with. ✅ Common pitfalls Dropping be after a modal in passive. Forcing an object after the preposition when none is needed. Final AnswerThese kittens can be played with quite safely.

Question 12

Active-to-passive voice (modal perfect): Convert the sentence to the correct passive that preserves the perfect modal sequence.  Source sentence: A child could not have done this mischief.  Instruction: Choose the grammatically correct passive-voice…

Accepted Answer

Given data Active sentence: A child could not have done this mischief. Target: Passive with modal perfect. Concept / ApproachPassive with modal perfect: modal + have + been + past participle. Step-by-step transformationObject becomes subject: this mischief → This mischiefApply modal perfect passive chain: could not have been doneAgent in by-phrase: by a childFinal passive: This mischief could not have been done by a child. Eliminate wrong optionsA: Uses could not be done (simple modal), loses perfect aspect. ❌B: Omits have before been; ungrammatical. ❌C: Matches modal perfect passive exactly. ✅D: Word order is incorrect and ungrammatical. ❌ Common pitfalls Forgetting have in the perfect passive chain. Changing aspect or tense unintentionally. Final AnswerThis mischief could not have been done by a child.

Question 13

Active-to-passive voice (simple past): Convert the sentence to the correct passive while preserving tense and agent.  Source sentence: James Watt discovered the energy of steam.  Instruction: Choose the grammatically correct passive-voice option.

Accepted Answer

Given data Tense: simple past. Active: James Watt discovered the energy of steam. Concept / ApproachPassive in simple past: was/were + past participle. Step-by-step transformationObject → subject: the energy of steam → The energy of steamAuxiliary: wasPast participle: discoveredAgent: by James WattFinal passive: The energy of steam was discovered by James Watt. Eliminate wrong optionsA: Misordered active-like structure; ungrammatical meaning. ❌B: Correct passive in simple past. ✅C: Nonsensical reversal of roles. ❌D: Changes tense and adds by the steam; incorrect. ❌ Final AnswerThe energy of steam was discovered by James Watt.

Question 14

Active-to-passive voice (habitual present): Convert the sentence to a correct passive that preserves routine frequency adverbials.  Source sentence: She makes cakes every Sunday.  Instruction: Choose the grammatically correct passive-voice option.

Accepted Answer

Given data Tense: simple present habitual action. Adverbial: every Sunday. Concept / ApproachSimple present passive: am/is/are + past participle; place time adverbials naturally. Step-by-step transformationObject → subject: cakes → CakesAuxiliary: arePast participle: madeAgent: by herAdverbial: every Sunday at the endFinal passive: Cakes are made by her every Sunday. Eliminate wrong optionsA: Missing auxiliary; fragment. ❌B: Correct form and placement. ✅C: Reverses roles; nonsense. ❌D: Uses past tense were; changes time reference. ❌ Final AnswerCakes are made by her every Sunday.

Question 15

Active-to-passive voice (prepositional verb): Convert the sentence to passive, retaining the preposition with the verb.  Source sentence: She spoke to the official on duty.  Instruction: Choose the grammatically correct passive-voice option.

Accepted Answer

Given data Verb pattern: speak to someone (prepositional verb). Active: She spoke to the official on duty. Concept / ApproachIn passive, the preposition to remains with spoken (spoken to). The object of the preposition becomes the subject. Step-by-step transformationObject of preposition → subject: the official on duty → The official on dutyAuxiliary in past: wasPast participle + preposition: spoken toAgent: by herFinal passive: The official on duty was spoken to by her. Eliminate wrong optionsA: Correct passive with preposition stranded after the verb. ✅B: Misplaced on duty modifying her; changes meaning. ❌C: Swaps roles; wrong subject. ❌D: Unrelated infinitival construction; incorrect. ❌ Final AnswerThe official on duty was spoken to by her

Question 16

Active-to-passive voice (reporting advice with infinitive): Convert the sentence to passive, keeping the negative infinitive intact.  Source sentence: The doctor advised the patient not to eat rice.  Instruction: Choose the grammatically correct pas…

Accepted Answer

Given data Verb: advise + object + to-infinitive (negative). Active: The doctor advised the patient not to eat rice. Concept / ApproachPassive keeps the infinitive phrase with the object now as subject; tense stays simple past. Step-by-step transformationObject becomes subject: the patient → The patientAuxiliary (past): wasPast participle: advisedRetain negative infinitive: not to eat riceAgent: by the doctorFinal passive: The patient was advised by the doctor not to eat rice. Eliminate wrong optionsA: Correct tense and structure. ✅B: Changes structure to a that-clause; less direct and not required. ❌C: Ungrammatical and repetitive. ❌D: Uses present perfect has been advised; changes tense. ❌ Final AnswerThe patient was advised by the doctor not to eat rice.

Question 17

Active-to-passive voice (modal negative): Convert the sentence to a passive that preserves the modal and agent.  Source sentence: I cannot accept your offer.  Instruction: Choose the grammatically correct passive-voice option.

Accepted Answer

Given data Modal: cannot. Active: I cannot accept your offer. Concept / ApproachPassive with modal: modal + be + past participle. The original object becomes the subject; include the by-agent when required. Step-by-step transformationObject → subject: your offer → Your offerModal passive: cannot be acceptedAgent: by me (retained to mirror the active sentence)Final passive: Your offer cannot be accepted by me. Option checkA: Correct and complete passive with agent. ✅B: Nonsensical role reversal. ❌C: Article change the offer may be acceptable, but the given key keeps your offer; A is best. ❌D: Omits the agent; grammatically fine but loses information present in the active. ❌ Final AnswerYour offer cannot be accepted by me.

Question 18

Active-to-passive voice (modal advice with time expression): Convert the sentence to passive, maintaining the time clause and replacing the repeated pronoun with a suitable passive clause.  Source sentence: You should open the wine about three hours…

Accepted Answer

Given data Active: You should open the wine about three hours before you use it. Structure: modal + verb with a temporal subclause. Concept / ApproachPassive with modal: should be opened. In the subordinate clause, replace you use it with a passive it is used to avoid an indefinite agent. Step-by-step transformationObject → subject: the wine → WineMain clause passive: should be openedTime phrase retained: about three hours beforeSubclause passive: it is usedFinal passive: Wine should be opened about three hours before it is used. Eliminate wrong optionsA: Acceptable concise style but omits it is used; less faithful to the original clause. ❌B: Adds by you; stylistically inferior and unnecessary. ❌C: Remains partly active in the subclause. ❌D: Fully and correctly passive in both parts. ✅ Final AnswerWine should be opened about three hours before it is used.

Question 19

Active-to-passive voice (simple future): Convert the sentence to a correct passive that preserves the agent phrase.  Source sentence: They will inform the police.  Instruction: Choose the grammatically correct passive-voice option.

Accepted Answer

Given data Tense: simple future. Active: They will inform the police. Concept / ApproachPassive in future: will be + past participle. Step-by-step transformationObject → subject: the police → The policeAuxiliary: will bePast participle: informedAgent: by themFinal passive: The police will be informed by them. Option analysisA: Correct passive form and word order. ✅B: Reverses roles to active with police as subject; wrong meaning. ❌C: Uses present are informed; wrong tense. ❌D: Inverted, unnatural word order. ❌ Final AnswerThe police will be informed by them.

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