Công thức câu bị động ở thì quá khứ đơn:

$S+was/were+VpII+(by+O)....$

"was"dùng với chủ ngữ(S) ngôi số ít như I/She/He/N số ít

"were"dùng với chủ ngữ(S) ngôi số nhiều như We/They/You/N số nhiều.

-Mệnh đề chỉ thời gian đứng sau (by+O)

-Mệnh đề chỉ nơi chốn đứng trước (by+O)

1. This bag was bought yesterday.

2. A lot of fish were caught by this man last week.

3. An interesting film was watched by us last night.

4. Two months ago, that museum was built here.

5. The clothes were inroned by her yesterday.

6.  A lot of cows were raised on their farm by the farmers.

7. This bottle was broken by Peter.

8. We were given more information by her.

Bị động qkđ: [ S + was/were + P2 + (place) + by O + ( time ) ] 1. I bought this bag yesterday -> This bag was bought yesterday 2. This fish man caught a lot of fish last week -> A lot of fish were caught by the fish man last week 3. We matched an interesting film last night -> An interesting film was matched last night 4. Two months ago, they built that museum here -> That museum was built here two months ago 5. She ironed the clothes yesterday -> The clothes were ironed yesterday 6. The famers raised a lot of cows on their farm -> A lot of cows were raised on their farm by the farmers 7. Peter broke this bottle -> This bottle was broken by Peter 8. She gave us more information -> We were given more information