Question Detail

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

1. Let us play.

It is suggested that we could play.
It is suggested that we should play.
It is suggested to play.
No change

Answer: Option B

Explanation:

When we use "us" after "Let", it means it is a suggestion. So it is converted as this example.

2. Someone has stolen his book.

His book is been stolen.
His book has been stolen.
His book is stolen.
His book has stolen.

Answer: Option B

Explanation:

Apart from Rule to make active voice of Present Perfect Tense, which is

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

Please also note that words like, "someone", "somebody", "people", "police", "public" etc are dropped. But in rare cases we can use them if sentence meaning is not clear.

3. They may win the battle.

The battle may be win.
The battle may be won.
The battle may be won by them.
The battle may won.

Answer: Option B

4. Let us sing.

It is suggested, we should sing.
It is suggested to sing.
It is suggested that we could sing.
It is suggested that we should sing.

Answer: Option D

5. Who wrote this book ?

By whom is this book written ?
By whom was this book written ?
By who was this book written ?
By whom were this book written ?

Answer: Option B