Active & Passive Voice — Set 7
Questions 61–70 of 140
Change to Passive Voice: 'The doctor may prescribe antibiotics.'
Correct Answer: A. Antibiotics may be prescribed by the doctor.
Modal Passive = modal + be + past participle. 'May prescribe' → 'may be prescribed'. The modal 'may' stays unchanged. 'Prescribe' → 'prescribed'. 'The doctor' → 'by the doctor'. Never substitute one modal for another; keep the original modal.
Change to Passive Voice: 'He might fail the exam.'
Correct Answer: C. The exam might be failed by him.
Modal Passive = modal + be + past participle. 'Might fail' → 'might be failed'. The modal 'might' is preserved exactly. 'Fail' → 'failed' (past participle). 'He' → 'by him'. 'The exam' becomes the passive subject. Do not change 'might' to 'may' or any other modal.
Change to Passive Voice: 'You ought to complete your homework.'
Correct Answer: B. Your homework ought to be completed by you.
Modal Passive with 'ought to' = ought to + be + past participle. 'Ought to complete' → 'ought to be completed'. 'Be' is inserted between 'to' and 'completed'. 'Complete' → 'completed'. 'You' → 'by you'. 'Your homework' becomes the passive subject.
Change to Passive Voice: 'We need to repair the car.'
Correct Answer: B. The car needs to be repaired by us.
With 'need to + verb', the passive = need to + be + past participle. 'Need to repair' → 'needs to be repaired'. Since 'car' is singular, 'needs' (third person singular) is used. 'Repair' → 'repaired'. 'We' → 'by us'. This is an infinitive passive construction.
Change to Passive Voice: 'She could have solved the problem.'
Correct Answer: C. The problem could have been solved by her.
Modal Perfect Passive = modal + have + been + past participle. 'Could have solved' → 'could have been solved'. 'Be' is inserted between 'have' and the past participle 'solved'. The modal 'could' stays. This structure expresses past possibility. Do not drop 'have'.
Change to Passive Voice: 'He should have informed me earlier.'
Correct Answer: A. I should have been informed by him earlier.
Modal Perfect Passive = modal + have + been + past participle. 'Should have informed' → 'should have been informed'. 'Me' (object) → 'I' (subject). 'By him' is the agent. 'Earlier' (adverb) is retained. This expresses a past obligation that was not fulfilled.
Change to Passive Voice: 'They must have stolen the jewels.'
Correct Answer: B. The jewels must have been stolen by them.
Modal Perfect Passive = modal + have + been + past participle. 'Must have stolen' → 'must have been stolen'. 'Stolen' is already the past participle of 'steal'. The modal 'must' expresses deduction/certainty. 'They' → 'by them'. 'The jewels' becomes the passive subject.
Change to Passive Voice: 'You can see the mountains from here.'
Correct Answer: B. The mountains can be seen from here.
Modal Passive = modal + be + past participle. 'Can see' → 'can be seen'. When the subject is vague ('you' used generally), 'by you' is typically omitted. 'From here' (location) is retained. 'The mountains' becomes the passive subject. This is a common impersonal passive.
Change to Passive Voice: 'Workers should maintain cleanliness in offices.'
Correct Answer: C. Cleanliness should be maintained in offices by workers.
Modal Passive = modal + be + past participle. 'Should maintain' → 'should be maintained'. 'Cleanliness' (object) becomes subject. Location 'in offices' is retained. 'By workers' is the agent. The modal 'should' is unchanged. 'Maintain' → 'maintained' (past participle).
Change to Passive Voice: 'The teacher may not punish the students.'
Correct Answer: B. The students may not be punished by the teacher.
Negative Modal Passive = modal + not + be + past participle. 'May not punish' → 'may not be punished'. Negative 'not' stays between modal and 'be'. Modal 'may' is unchanged. 'The teacher' → 'by the teacher'. 'Students' (plural) is the passive subject.