Question Detail

He stole that watch.

That watch was stolen by him.
That watch stolen by him.
That watch stole by him.
That watch had stolen by him.

Answer: Option A

Explanation:

Note : Rule to make active voice of Simple Past Tense :

Passive subject + was/were + third form of verb + by + passive object

1. He had written a poem.

A poem has written by him.
A poem had written by him.
A poem had been written by him.
A poem has been written by him.

Answer: Option C

Explanation:

Note :- Rule to make active voice of Past Perfect Tense :

Passive subject + had + been + third form of verb + by + passive object

2. Open the window.

Let the window be opened.
Let the window will be opened.
Let the window was opened.
Let the window is opened.
Let the window is been opened.

Answer: Option A

3. I must help him.

He must helped by me.
I must held him.
He must get help from me.
He must be helped by me.

Answer: Option D

Explanation:

If we have "Subject + Modal Auxiliary verb + first verb + object"
then we change it to

Passive subject + Modal Auxiliary verb + be + third form + by + passive object.

Modal Auxiliary verb are : can, could, shall, will, may, might, should, would, must, ought to etc.

4. Did he buy a car ?

Was a car bought by him.
Did car bought by him.
Did a car bought by him.
Were a car bought by him.

Answer: Option A

5. You sing songs.

songs are sung by you.
song are sang by you.
songs was sung by you.
songs is sung by you.
songs are sing by you.

Answer: Option A