Question

Change to passive voice---
1. Who has bought this dress?

Answer 1

By whom was this dress bought?

Questions starting with who, when needs to be changed to Passive voice, should start with by whom!

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Answer 2

Answer:

By whom was the dress brought? (Passive Voice)

Explanation:

In passive voice the action that is being performed is dependent on object rather than the subject, so the main attention is given to the action being performed or the main verb of the sentence. In the given sentence, the subject is 'who', 'bought' is the main verb and the object is the 'dress'.

In passive voice the subject 'who' will be changed to 'whom', and to signify the action performed by the subject we add BY to it. The verb form used in the sentence should be the third form of the verb, (both the second and third form of the verb bring is brought), so the final sentence changed into passive voice is: By whom was the dress brought?

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