`2.`  He did his home work last night . (Bị động quá khứ đơn)

`→` His home work was done last night by him .

`3.`  He write a letter last week . (Bị động quá khứ đơn)

`→` A letter was writen last week by him .

`4.`  Nam has just finished his assigment . (Bị động hiện tại hoàn thành)

`→` His assigment has been just finished by Nam . 

`5.`  They plant a lot of trees in front of this . (Bị động hiện tạo đơn)

`→` A lot of trees are planted in front of this by them .

`6.`  People speak English everyday in Viet Nam . (Bị động hiện tại đơn)

`→` English is spoken everyday in Viet Nam .

`7.`  Lan built a house last year . (Bị động quá khứ đơn)

`→` A house was built last year by Lan .