1. Some trees have been planted.

2. A new school has just been built.

3. The report has just been finished by Jane.

4. A new idea has been suggested by our boss.

5. Peter hasn't been seen since last week.

- Vì câu 5 có no one là không một ai nên đã mang nghĩa phủ định => khi chuyển sang câu bị động vẫn ở dạng phủ định

- Cấu trúc bị động thì hiện tại hoàn thành : S + have/ has + been + VpII + (by + O)

CHÚC BẠN HỌC TỐT VÀ XIN CTLHN Ạ

1. Some trees have been planted 

2. A new school has just been built 

3. The report has just been finished by Jane

4. A new idea has been suggested by our boss

5. Peter hasn't been seen since last week

QKĐ: S + was/ were + PP + (by O)

QKTD: S + was/ were + being + PP + (by O)

QKHT: S + had + been + PP + (by O)

HTĐ: S + am/ is/ are + PP + (by O)

HTTD: S + am/ is/ are + being + PP + (by O)

HTHT: S + have/ has + been + PP+ (by O)

TLĐ: S + will be + PP + (by O)

TLG: S + is/ am/ are + going to + be + PP + (by O)

S + modal verb (should, must, have to, can,...) + be + PP + (by O)