Bị động:

- Thì HTĐ: S + am/is/are  +V3/ed 

- Thì QKĐ: S + was/were + V3/ed:

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I)

1. The lessons are explained to us by the teacher.

2. This letter is written to my sister in the USA.

3. A lot of stamps are collected by Nam.

4. Some good books are bought for our brother.

5. An old bridge is repaired in their village.

6. I am told a good story by her father every week.

7. Newspapers and magazines are red on the internet by Mr Ba.

8. Rice is planted in the fields.

9. Many exercises are done at the class by the students.

10. Dinner is often cooked for her mother.

II)

1. The windows and doors were painted green last month. 

2. Vietnamese was spoken in Japan by Mary.

3. This pencil was used to draw the pictures. 

4.

- They were sent some flowers by Mai and Lan in October.

- Some flowers were sent to them by Mai and Lan in October. 

5. English was studied for 10 years.

6. 

- We were given a lot of gifts by this woman on Christmas Day.

- A lot of gifts were given to us by this woman on Christmas Day.

`color{orange}{~MiaMB~}`