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. Bring the bottle of juice.

Let a bottle of juice be brought.
Let bottle of juice be brought.
Let a bottle of juice brought.
Let a bottle of juice be bring.

Answer: Option A

2. Ketan is answering the question.

The question was answered by ketan
The question is answered by ketan
The question is been answered by ketan
The question is being answered by ketan
The question was being answered by ketan

Answer: Option D

3. Mr. Sharma knows me.

I am known for Mr. Sharma.
I am known with Mr. Sharma.
I am known at Mr. Sharma.
I am known to Mr. Sharma.

Answer: Option D

Explanation:

Note: We use "to" preposition with word "Know"

4. Switch on the light.

Let the light be switch on.
Let the light should be switched on.
Let the light will be switched on.
Let the light be switched on.
Let the light switched on.

Answer: Option D

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.