Question Detail

They had not done their tasks.

Their tasks had not been done.
Their tasks had been not done.
Their tasks have not been done.
Their tasks have been not done.

Answer: Option A

1. 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"

2. They had not done their tasks.

Their tasks had not been done.
Their tasks had been not done.
Their tasks have not been done.
Their tasks have been not done.

Answer: Option A

3. You see that birds.

That bird are seen by you.
That bird is seen by you.
That bird was seen by you.
That bird is seen you.
That birds is seen by you.

Answer: Option B

4. 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.

5. 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