`1.`A beautiful song was sung (by her).

`2.`I was hit.

`3.`The bus was stopped.

`4.`My car was stolen by a thief.

`5.`My pencil was broken by my classmates.

`6.`A new smartwatch was bought.

`7.`Our beds were made by my mom.

`8.`A interesting story was told by the story teller.

`9.`A long message was written.

`10.`My heart was broken.

* Giải thích :

Câu chủ động với thì quá khứ đơn : S + V2/ed + O

`=>`Câu bị động : S + was/were + Vpp + (by O)

`*`Notes :

+) Trong câu bị động, "by O" luôn đứng cuối câu trừ khi có trạng ngữ chỉ thời gian `=>`trạng ngữ chỉ thời gian đứng cuối câu

+) Với chủ ngữ là "He, She, I, They, We", khi chuyển sang câu bị động thì ta có thể lược bỏ phần "by O"

`-`Trong câu bị động :

+) Nếu S là chủ ngữ số ít `=>`be chia thành was

+) Nếu S là chủ ngữ số nhiều `=>`be chia thành were

1.A beautiful song was sung by her . 

2.I was hit.

3. The bus was stopped. 

4. My car was stolen by a thief.

5. My pencil was broken by my classmates. 

6. A new smartwatch was bought. 

7. Our beds were made by my mom. 

8. A interesting story was told by the story teller. 

9. A long message was written. 

10. My heart was broken. 

-> Câu bị động ở thì Quá Khứ Đơn 

-> Cấu trúc :  S(O)+ was/were + Vpp + by O(S)

-> Nếu O là somebody,people ,.... thì ko dùng by 

@Chae