Question Detail

Who is creating this mess?

By whom this mess is being created?
By whom is this mess being created?
Who has been created this mess?
By whom has this mess been created?

Answer: Option B

1. Post this letter.

Let this letter be post.
Let this letter be posted.
Let this post be letter.
Let this letter is posted.
Let this letter are posted.

Answer: Option B

2. Savita does not like me.

I am not like by Savita.
I am not liked by Savita.
I was not liked by Savita.
I were not liked by Savita.

Answer: Option B

3. He was writing a love letter.

A love letter had being written by him.
A love letter being written by him.
A love letter was written by him.
A love letter was being written by him.

Answer: Option D

Explanation:

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

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

4. She wants that she should be respected.

She wanted to respected.
She wants to respected.
She wanted to be respected.
She wants to be respected.

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.