21. We should save non-renewable energy – Non-renewable energy should be save by us ( bị động của ĐT khuyết: S+should+be+V_P2+by+O)

22. Those farmers produce a lot of products every year – A lot of products is produced by those farmers every year.

23. We will protect our environment.

Our environment will be protect by us.

24. They can't put those solar panels on the roof of the house

Those solar panels can't be put on the roof of the house. (bỏ they)

25. Our parents will use many sources of energy

-Many sources of energy will be used by our parents.

26. Minh has done the test - The test has been done by minh.

27. The children have eaten all the mangoes - All the mangoes have been eaten by the children.

28. They write postcards every Christmas - Postards are written every Christmas (bỏ by vì they là TH ngoại lệ)

*Mk gửi lại ạ vì nãy ko hiểu sao bị xóa, có gì bạn đánh giá 5 sao lại giúp mk nhé ^^*

Câu bị động ( Thì HTĐ `-` HTHT `-` TLĐ `-` ĐTKT ) :

`-` Thì HTĐ : S + be + V3 / PII ( by O )

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

`-` Thì TLĐ : S + will be + V3 / PII ( by O )

`-` ĐTKT : S + ĐTKT + be + V3 / PII ( by O )

`21`.Non-renewable energy should be saved

`22`.A lot of products are produced by those farmers every year

`23`.Our enviroment will be protected

`24`.Those solar panels can't be put on the roof of the house

`25`.Many sources of energy will be used by our parents

`26`.The test has been done by Minh

`27`.All the mangoes have been eaten by the children

`28`.Postcards are written every Christmas

`\text{@ TheFox}`