Question

Change the following sentences in active to passive voice
Present Perfect Tense
1. They have received gifts.
2. They have not locked all the rooms.
3. Have you finished your work?
4. Why have you sent for the doctor?
5. Who has switched off the radio?
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Answer 1

1. The gifts have been received by them.
2. All the rooms have not been locked by them.
3. Has the work been finished by you?
4. Why you have been sent for the doctor?
5. By whom has the radio been switched off?

Answer 2

Answer:

The gifts have been received by them.

The rooms have not been locked by them.

Has your work been finished by you?

Why has the doctor been sent for by you?

By whom has the radio been switched off?

Step-by-step explanation:

all are correct