1. The waiter gives me this dish.

-> I am given this dish by the waiter.

-> This dish is given to me by the waiter.

2. Our friends sent these postcards to us.

-> We were sent these postcards by our friends.

-> These postcards were sent to us by our friends.

3. The shop assistant handed these boxes to the customers.

-> The customer was handed these boxes by the shop assistant.

-> These boxes were handed to the customer by the shop assistant.

4. We have given Ann some bananas and some flowers already.

-> Some bananas and some flowers have been given to Ann already (by us).

-> Ann has been given some bananas and some flowers already (by us).

5. She is bringing some cups of tea to the visitors in the next room.

-> Some cups of tea is being brought to visitors in the next room by her.

-> The visitors are being brought some cups of tea in the next room by her.

6. Peter showed his ticket to the airline agent.

-> The airline agent was showed his ticket by Peter.

-> Peter's ticket was showed to the airline agent by him.

1. I am given this dish by the waiter

   This dish is given me by the waiter

2. We were sent these postcards by our friends 

    These postcards were sent to us by our friends

3. The customer was handed these boxes by the shop assistant

   These boxes were handed to the customer by the shop assistant

4. Ann has been given some bananas and some flowers already

   Some bananas and some flowers have been given already

5. The visitors are being brought some cups of tea in the next room by her

    Some cups of tea are being brought to the visitors in the next room by her

6. The airline agent was showed/ shown his ticket by Peter 

    His ticket was showed/ shown to the airline agent by Peter

QKĐ: S + was/ were + PP + (by O)

QKTD: S + was/ were + being + PP + (by O)

QKHT: S + had + been + PP + (by O)

HTĐ: S + am/ is/ are + PP + (by O)

HTTD: S + am/ is/ are + being + PP + (by O)

HTHT: S + have/ has + been + PP+ (by O)

TLĐ: S + will be + PP + (by O)

TLG: S + is/ am/ are + going to + be + PP + (by O)

S + modal verb (should, must, have to, can,...) + be + PP + (by O)