Question Detail

The police will have caught the culprit.

The culprit will have caught by the police.
The culprit have been caught by the police.
The culprit will have been caught by the police.
The culprit would have been caught by the police.

Answer: Option C

Explanation:

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

Passive subject + will/shall + have + been + third form of verb + by + passive object

1. Thief killed him.

He was kill by the thief.
He killed by the thief.
He was killed by the thief.
He was killed.

Answer: Option C

2. 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

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. After driving Professor Jones to the museum she dropped him at his hotel.

After she was driven Professor Jones to the museum she had dropped him at his hotel.
After she had driven Professor Jones to the museum she had dropped him at his hotel.
Professor Jones was being driven dropped at his hotel.
After being driven to the museum, Professor Jones was dropped at his hotel.

Answer: Option D

5. The police caught the culprit.

The culprit were caught be the police.
The culprit was caught be the police.
The culprit caught be the police.
The culprit had caught be the police.

Answer: Option B