1. This flower is watered by my father every morning 

2. Fiona was invited to John's party by John last night 

3. The dinner is being prepared by her mother

4. Our teeth should be cleaned twice a day

5. The English Grammar has been explained by our teachers

7. Her parents will be visited by Tom next month

8. The secretary wasn't phoned by the manager

9. Was this beautiful dress bought by Mary?

10. These old pictures won't be hung by me

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

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)

TLG: S + is/ am/ are + going to + be + PP + (by O)

S + modal verb + be + PP + (by O)

1. This flower is watered by my father everyday

2.Fiona was invited to John's party last night

3.The dinner is being prepared by her mother

4.Our teeth should be cleaned by us twice a day

5.The English Grammar have been explained by our teachers

7. Next month Tom will be  visited her parents

8. The secretary wasn't phoned by the manager

9.Was this beautiful dress bought by Mary?

10.These old pictures won't be hang by me

11.This factory won't built by the german

12. This house and these cars are going to painted by the Greens

CÔNG THỨC

QKĐ S+WAS/WERE+P2/ED

TLĐ S+WILL+BE+ P2/ED

TLG S+AM/IS/ARE+GOING TO+P2/ED

DTĐB : S+DTĐB(CAN,SHOULD....)+BE+P2

HTTD: S + AM/IS/ARE + BEING + PP 

HTHT: S + HAS/ HAVE + BEEN + PP