`1` My briefcase has been taken 

`-` Bị động thì HTHT : S + has/have + been + Vpp + ( by O ) 

`2` Our written work was returned to us by the teacher . 

`-` Bị động thì QKĐ : S + was/were + Vpp + ( by O ) 

`3` Her report had been finished by soon 

`-` Bị động thì QKHT : S + had + been + Vpp + ( by O ) 

`4` The little boy was bitten by the mad dog 

`-` Bị động thì QKĐ : S + was/were + Vpp + ( by O ) 

`5` Five suspects have been arrested by the police 

`-` Bị động thì HTHT : S + has/have + been + Vpp + ( by O )

`6` He was ordered to take a long rest by the doctor

`-` Bị động thì QKĐ : S + was/were + Vpp + ( by O ) 

`7` A paper is being ligtened 

`-` Bị động thì HTTD : S + is/am/are + being + Vpp + ( by O ) 

`+` Note : Nếu chủ ngữ không xác định thì khi chuyển sang câu bị động không cần dùng by O 

1. My briefcase has been taken

→ Lưu ý : Chủ ngữ chung chung như Somebody , Everybody , .... thì không dùng ( By O )

→  Cấu trúc : S + have / has + been + Vpp + ....

2. Our written work was returned to us by the teacher

→ Bị động thì Quá khứ đơn

→  Cấu trúc : S + was / were + Vpp + ....

3. Her report had been finished by soon ( by her )

→ Bị động thì Quá khứ hoàn thành

→ Cấu trúc : S + had + been + Vpp + ....

4. The little boy was bitten by the mad dog

→ Bị động thì Quá khứ đơn

→ Cấu trúc : S + was / were + Vpp + ....

5. Five suspects have been arrested by the police

→ Bị động thì Hiện tại hoàn thành

→ Cấu trúc : S + have / has + been + Vpp + ....

6. He was ordered to take a long rest by the doctor

→ Bị động thì Quá khứ đơn

→ Cấu trúc : S + was / were + Vpp + ....

7. A paper is being lightened ( by me )

→ Bị động thì Hiện tại tiếp diễn

→ Cấu trúc : S + am / is / are + being + Vpp + ....