`1.` His exercises were finished on time.

`->` Bị động quá khứ: S + was/were + V3/ed + by + O

`2.` Rice is planted in those fields.

`->`  Bị động hiện tại: S + is/am/are + V3/ed + by + O

`4.` My windows were broken by this boy yesterday.

`->` Bị động quá khứ: S + was/were + V3/ed + by + O

`5.` Was your test done perfectly?

 `->` Bị động quá khứ: Was/Were+ S + V3/ed + by + O? (nghi vấn)

`6.` Why was this lesson not learnt?

`->` Bị động quá khứ: Wh-words + was/were+ S + V3/ed + by + O? (Wh-questions)

`7.` He has been known well.

`->`  Bị động hiện tại hoàn thành: S + has/have + been + V3/ed + by O

`8.` The cheque must be signed by the manager.

`->`  Bị động modal verbs: S + modal verbs + be + V3/ed + by + O

`9.` The concert has been postponed.

`->`  Bị động hiện tại hoàn thành: S + has/have + been + V3/ed + by O

`11.` A video recorder was bought for me by my father.

`->` Bị động quá khứ: S + was/were + V3/ed + by + O

`12.` The witness wasn't interviewed by the police.

`->` Bị động quá khứ: S + was/were + not + V3/ed + by + O (phủ định)

`3.` Cars and trucks are used to carry food to market.

`->`  Bị động hiện tại: S + is/am/are + V3/ed + by + O

`10.` A new hospital has been built near the airport.

`->`  Bị động hiện tại hoàn thành: S + has/have + been + V3/ed + by O

`13.` The younger son hasn't been seen for three weeks.

`->`  Bị động hiện tại hoàn thành: S + has/have + not + been + V3/ed + by O (phủ định)