`-` Câu bị động :

`+` HTĐ : S + is / am / are + V3 / PII ( by O )

`+` HTTD : S + is / am / are + being + V3 / PII ( by O )

`+` Can : S + can be + V3 / PII ( by O )

`+` HTHT : S + have / has + been + V3 / PII ( by O )

`1`.A lot presents can be bought for their friends

`2`.These chemicals are being sold everywhere in my hometown

`3`.The lights are always turned off by my children when going to bed

`4`.Their paper test all has been finished

`\text{# Kirigiri}`

1. A lot of presents can be bought for their friends

Bị động với động từ khuyết thiếu can: can be Vp2

2. These chemicals are being sold everywhere in my hometown

Bị động với thì hiện tại tiếp diễn: is/are/am being Vp2

3. The lights are always turned off by my children when going to bed

Bị động với hiện tại đơn: is/am/are + Vp2

4. Their paper test has been finished

Bị động với thì hiện tại hoàn thành: have/has been Vp2