1. This flower is watered by my father every morning

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

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

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 next month

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

9. Was this beautiful dress made 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 greeens for christmas day

`@kem`

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

`2.⇒`Fiona was invented to John’s birthday party last month

`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 teacher

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

`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 by me

`11.⇒`This factory wasn’t built by the Greens during the Second World War

`12.⇒`This house and these cars are going to be painted for Chrismas day by the Greens

Cấu trúc: Thì quá khứ đơn:

S + V(ed/`P_2`) + O

`→`S + was/were + `P_2`

Thì hiện tại đơn:

S + V(s/es) + O

`→`S + am/is/are + P2