`1.` We are taught physics at school by Mrs. Pike.

`2.` How was he known today?

`3.` The cake wasn't put on the table by Jenny last night.

`4.` John's girl friend has been waited for by John for two hours.

`5.` Will your homework be finished tomorrow?

`6.` This type writer has not been used for a long time.

`7.` When was the island first discovered?

`8.` I have not been told about the project before.

`9.` Jim is congratulated on passing the exam.

`10.` Computers have been used since 1940.

$-------$

Câu bị động:

- Thì hiện tại đơn: S + is/ am/ are + VptII

- Thì quá khứ đơn: S + was/ were + VptII

- Thì tương lai đơn: S + will + be + VptII

- Thì hiện tại hoàn thành: S + has/ have + been + VptII

$\text{Công thức câu bị động:}$

$\text{Thì hiện tại đơn: S + is/ am/ are + VptII}$

$\text{Thì quá khứ đơn: S + was/ were + VptII}$

$\text{Thì tương lai đơn: S + will + be + VptII}$

$\text{Thì hiện tại hoàn thành: S + has/ have + been + VptII}$

1. Mrs . pile teaches us physics at school.

-> We are taught physics at school by Mrs. Pike.

2. How do you know him today.

-> How was he known today?

3. Jenny didn't put the cake on the table last night.

-> The cake wasn't put on the table by Jenny last night.

4. John has waited for his girl friend for two hours.

-> John's girl friend has been waited for by John for two hours.

5. Will you finish your homework tomorrow.

-> Will your homework be finished tomorrow?

6. They have not used this type writter for along time.

-> This type writer has not been used for a long time.

7. When did they first discover the island?

-> When was the island first discovered?

8. No one has told me about the project before.

-> I have not been told about the project before.

9. Everyone congratulates Jim on passing the exam.

-> Jim is congratulated on passing the exam.

10. People have used computers since 1940.

-> Computers have been used since 1940.