`1`. Our study materials haven't been downloaded by Jaqueline.

`-` Bị động Hiện tại hoàn thành: S + have/has + (not) + been + V3/ed + by(O)

`2`. When could this package be delivered `?`

`@` Bị động ĐTKK:

(`?`) Can/Could/May/Might/Must/Should + S + be + V3/ed + by(O) ?

`3`. A video game wasn't being downloaded by Jack last night.

`@` Bị động quá khứ tiếp diễn:

`-` S + was/were + (not) + being + V3/ed + by(O)

`-` Trạng từ chỉ thời gian đứng sau by(O)

`-` A video game (số ít) `->` was

`4`. How many laptops are sold by this company every year `?`

`@` Bị động Hiện tại đơn (DHNB: Every year):

(`?`) (Wh-word) + S + am/is/are + V3/ed + by(O) ?

`5`. Your mobile phones mustn't be used in class.

`@` Bị động ĐTKK:

`-` S + should/can/could/may/might/must + (not) + be + V3/ed + by(O)

1. Our study materials haven't been downloaded by Jaqueline.
2. When could this package be delivered?
3. A video game wasn't being downloaded by Jack last night.
4. How many laptops are sold by this company every year?
5. Your mobile phones mustn't be used in class.

Công thức bị động chung:

S+be (thì phù hợp)+ Vpp +[by O]