`1` This flower is watered by my father every morning

`-` Bị động thì Hiện Tại Đơn : S + is/am/are + Vpp +( by O ) 

`2` Fiona was invited to John's birthday party last night  

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

`3` The dinner is being prepared by her mother in the kitchen

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

`4` Our teeth should be cleaned twice a day

`-` Bị động của ĐT khuyết thiếu : S + modal verb + be + Vpp + ( by O ) 

`5` The English grammar has been explained by our teachers 

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

`6` The accident was caused by some drunk drivers in this city

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

`7` Tom's parents will be visited next month 

`-` Bị động thì Tương Lai Đơn : S + will + be + Vpp + ( by O ) 

`8` The secretary wasn't phoned by the manager this morning

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

`9` Was this beautiful dress made by Mary ?

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

`10` These old pictures won't be hung in the living room 

`-` Bị động thì Tương Lai Đơn : S + will + be + Vpp + ( by O ) 

`11` This factory wasn't built by the german during the second world war 

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

`12` This house and these cars are going to be painted by the greeens for christmas day

`-` Bị động thì Tương Lai Gần : S + is/am/are + going to+ be + Vpp + ( by O ) 

`13` The cats had been fed by Ann before she went to the cinema 

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

`14` The pollution problems have been discussed by the students since last week

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