In the questions below the sentences have been given in Active/Passive voice. From the given alternatives, choose the one which best expresses the given sentence in Passive/Active voice.
Must we cut this tree?
Answer: B
Correct answer: Must this tree be cut.
A modal takes be + participle in the passive, so must we cut becomes must this tree be cut. Will cut, was cut and is cut all put a second finite verb after the modal.
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Didn't they tell you to be here by six O'clock?
Answer: A
Correct answer: Weren't you told to be here by six O'clock?
Tell has two objects and it is the person that becomes the subject: you. The past simple negative question didn't they tell becomes weren't you told, with did absorbed into were. The other options keep the active or change the verb.
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Don't touch this switch.
Answer: B
Correct answer: This switch must not be touched.
A negative imperative goes passive with a modal of prohibition: must not be touched. Need not makes it optional, and does not be and don't be are not English.
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One cannot gather grapes from thistles.
Answer: B
Correct answer: Grapes cannot be gathered from thistles.
The object grapes becomes the subject, and the indefinite one disappears rather than becoming an agent. The first option reverses grapes and thistles, and the last introduces them, whom the proverb never mentions.
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They will have completed the work by the time we get there.
Answer: B
Correct answer: The work will have been completed by the time we get there
The future perfect will have completed becomes will have been completed. The subordinate clause by the time we get there keeps its present tense, which is why the option changing it to have got is wrong.
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You will have to pull down this skyscraper as you have not complied with the town planning regulations.
Answer: B
Correct answer: This skyscraper will have to be pulled down by you as the town planning regulations have not been complied with
Both halves go passive. Will have to pull down becomes will have to be pulled down, and you have not complied with becomes the regulations have not been complied with, keeping the preposition attached. The agent by you is retained because the obligation is his.
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You are requested to permit him.
Answer: A
Correct answer: Please permit him.
You are requested to is the passive of a request, so the active is the plain imperative with please. Turning it into I request you introduces a first person the original does not name.
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Their task had been completed before it was dark.
Answer: D
Correct answer: They had completed their task before it was dark.
The past perfect passive had been completed becomes the active had completed, with they supplied as the agent. The tense must stay past perfect, since the completion precedes the darkness.
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The Bihar government has launched a massive tribal welfare program in the state.
Answer: C
Correct answer: A massive tribal welfare program has been launched by the Bihar government in the state.
The present perfect has launched becomes has been launched. The past perfect option changes when it happened, and is been launched is not a verb form.
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He laughed at the beggar.
Answer: A
Correct answer: The beggar was laughed at by him.
Laugh at is a prepositional verb, so at stays with the participle; dropping it leaves the verb unable to reach its object. The past simple gives was laughed at, not the continuous.
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