1. That letter is written by Lan

2. This class is taught by Mr.Khang

-> Bị động - Hiện tại đơn

(+) S + is/am/are + PII (by.......)

- She, he, it và N số ít - is

- You, we, they và N số nhiều - are

- I - am

3. The dog was found (by them)

4. The cake was made by my mother

5. A lot of homework were done by Nam

-> Bị động - Quá khứ đơn :

(+) S + was/were + .....

- I, she, he, it và N số ít - was

- You, we, they và N số nhiều - were

1. The letter is written by Lan

2. This class is taught by Mr. Khang

Cấu trúc bị động (thì hiện tại đơn): S + am/is/are + Vpt2 + (by O)

3. The dog was found 

4. The cake was made by my mother

5. A lot of homework were done by Nam

Cấu trúc bị động (thì quá khứ): S + was/were + Vpt2 + (by O)