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. Who taught you English ?

By who were you taught English.
By which were you taught English.
By whom you were taught English ?
By whom were you taught English ?

Answer: Option D

2. We hate him.

He has hated by us.
He is hated by us.
He was hated by us.
He will hated by us.

Answer: Option B

3. Shivu is singing a song.

A song has been being sung by Shivu.
A song is sung by Shivu.
A song has being sung by Shivu.
A song is being sung by Shivu.

Answer: Option D

4. He found the student guilty.

The student was found to be guilty by him.
The student was found guilty by him.
The student was found to guilty by him.
The student found to be guilty by him.

Answer: Option A

5. We must have obeyed our teachers.

Our teachers might have obeyed.
Our teachers might have been obeyed.
Our teachers must have been obeyed.
Our teachers must have obeyed.

Answer: Option C

Explanation:

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

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

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