1. Her telephone number isn't known by me.

2. Tea can't be made with cold water.

3. This machine mustn't be used after 5:30 pm.

4. These old pictures won't be hang in the living room.

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

6. The moon cakes weren't made by her last week.

7. They aren't met by him in her school yesterday.

8. A letter won't be written by Anna.

9. The workers' building hasn't been decorated by them yet.

10. A burglar hasn't been arrested.

11. Dinner aren't being cooked on the beach.

12. Grammar exercises isn't being done by Tina.

13. This house wasn't being built at this time last year.

14. My friends weren't being chatted by me while the lesson was being taught by teacher yesterday.

15. After the children's homework hadn't been finished, they went to bed. 

16. When her work hadn't been done, she went to the cinema.

17. Films aren't going to be watched with my friend because I am sick.

18. A delicious meal for dinner isn't going to be cooked by my sister.

Giải thích:

*Bị động:

- Chủ động: S + V + O

`->` Bị động: S(o) + be Vp2 + (by Os).

- Chủ động: S + be + V-ing + O

`->` Bị động: S(o) + be + being + Vp2 + (by Os).

- Chủ động: S + have/has/had/will have + Vp2 + O

`->` Bị động: S(o) + have/has/had/will have + been + Vp2 + (by Os).

- Chủ động: S + can-could

                         will-would

                         may-might

                         shall-should                      + V + O

                         ought to

                         must

                        have to

                        used to

                        be going to

`->` Bị động:  S(o) + can-could

                              will-would

                              may-might

                             shall-should                  + be + Vp2 + (by Os).

                             ought to

                             must

                             have to

                             used to

                             be going to

1. I don’t know her telephone number.

=>Her telephone number isn't known by me

2. They can’t make tea with cold water.

=>Tea can't be made with code water

3. You mustn’t use this machine after 5:30 p.m.

=>This machine mustn't be used after 5:30 p.m

4.I won’t hang these old pictures in the living room

=>These old pictures won't be hung in the living room

5.The German didn’t build this factory during the Second World War.

=>This factory wasn't built by the german during the Second World War

6.She didn't make the moon cakes last week.

=>The moon cakes weren't made last week

7. He doesn't meet them in her school everyday.

=>They aren't met in her school everyday

8.Anna won't wtite a letter.

=>A letter won't be written by anna

9. The workers haven't decorated their building yet

=>The workers'building has not been decorated by them yet.

10. The police hasn't arrested a burglar.

=>A burglar has not arrested by the police

11. Two people aren't cooking dinner on the beach

=>Cooking dinner is not being cooked by 2 people on the beach

12. Tina isn't doing grammar exercises.

=> Grammar exercises is not done by Tina

13. At this time last year, they ­­­­­­­­­­­­weren't building this house.

=>This house was not being built by them at this time last year

14. I wasn't chatting with my friends while my teacher was teaching the lesson yesterday.

=>My friend was not chatted  with me while the lesson was being taught by my teacher yesterday

15. After the children hadn't finished their homework, they went to bed.

=>After the children's homework had not been finished by the children, they went to bed. 
16. When she hadn't done her work she went to the cinema.
=>When her work had not been done , she went to the cinema.
17. I am not going to watch films with my friend because I am sick.
=>The films is not going to be watched with my friend by me because of my sickness.
18. My sister isn't going to cook a delicious meal for dinner.
=>A delicious meal is not going to be cooked for dinner by my sister.