1. Exercises are often done by him every night

2. The room is usually decorated by her at weekends

3. Country songs are always sung by Daisy

4. Sweets are often given her sister by her

5. These trees are often watered by Nam and Peter 

6. Cars are produced in this country

7. Smoking isn't allowed in this restaurant 

8. Is the room cleaned by pupils every day?

*Cấu trúc bị động:

QKĐ: S + was/ were + PP + (by O)

HTĐ: S + am/ is/ are + PP + (by O)

HTTD: S + am/ is/ are + being + PP + (by O)

HTHT: S + have/ has + been + PP+ (by O)

TLĐ: S + will be + PP + (by O)