21. An article was written about our country by him.

-> Câu bị động quá khứ đơn: S + was/were + Vpp 

22. That novel has been translated into Vietnamese.

-> Câu bị động hiện tại hoàn thành: S + have/has + been + Vpp

23. The email is opened by my secretary every morning.

-> Câu bị động hiện tại đơn: S + is/am/are + Vpp

24. A new book will be published by him.

-> Câu bị động tương lai đơn: S + will be + Vpp

25. We were treated very kindly by the host.

-> Câu bị động quá khứ đơn: S + was/were + Vpp 

26. The report will be written by my wife. 

-> Câu bị động tương lai đơn: S + will be + Vpp

27. He has been transferred to naother class by his teacher.

-> Câu bị động hiện tại hoàn thành: S + have/has + been + Vpp

21 An article was witten about our country by him.

22 That novel has beeen translated into Vienamese by her

S+has/have+been+Vpp+O

23 Th mail is opened by my secrectary every morning

S+is/are/am+Vpp+O

24. A new book will be published by him

S+will+be+Vpp+O

25 We were treated very kindly by the host

S+was/were+Vpp+O

26 The report will be writren by my wife

S+will +be+Vpp+O

27 He has been transferred to another class by his teacher .

S+has/have+been+Vpp+O