`1)` Tom visited his parents last month

`=>` Tom's parents were visited last month

`-` QKĐ : S + was/were + P2 by O

`2)` I hung these old pictures in the living room

`=>` These old pictures were hung in the living room

`-` QKĐ : S + was/were + P2 by O

`3)` Ann fed the cats before she went to the cinema

`=>` The cats were fed before Ann went to the cinema

`-` QKĐ : S + was/were + P2 by O

`4)` They interview the new president on TV every week

`=>` The new president is interviewed on TV every week.

`-`HTĐ : S + am/is/are + P2 by O

`1`. Tom's parsents were visited by him last month.

- Bị động thì quá khứ đơn ( + ) S + was/ were + Vpp + (by O) + ...

- by O đứng trước trạng từ chỉ thời gian, sau trạng từ chỉ nơi chốn.

`2`. These old pictures were hung in the living room.

- Bị động quá khứ đơn

- hang - hung - hung: treo

`3`. The cats were fed before Ann went to the cinema.

- feed - fed - fed: cho ăn

`4`. The new president is inteviewed on TV every week.

- Bị động thì hiện tại đơn ( + ) S + am/is/are + Vpp + (by O).