Công thức 

câu bị động 

chủ ngữ + to be { chia theo chủ ngữ } + động từ v3 hoặc động từ thêm ed + by + ai đó + viết lại phần phía sau 

vd cái này mình ví dụ thôi nha

he plays football 

football is played by he hoặc có thể bỏ by he cũng đc vì nó k quan trọng 

nhưng tên người như polo hay deni là k bỏ nha bạn chỉ có he she it vv mới bỏ thôi 

mong là có ích cho bạn 

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

2. Fiona is invited to John's birthday party last night..

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

4. Our teeth should be cleaned twice a day.

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

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

7. Tom's parents will be visited by him next month.

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

9. Was this beautiful dress bought by Mary?

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

11. This factory wasn't built by the German during the Second World War.

12. This house and these cars are going to be painted by the Greens for Christmas Day.

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

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

15. Has the most valuable painting in the national museum been stolen by the thieves?

16. The new president will be interviewed on TV.

17. How many languages are spoken in Canada?

18. Are those shoes going to be repaired?

19. His nose has been broken in a football match.

20. Have the above sentences been finished?