1. We can never find him at home for he is always on the move

`->` He can never be found at home for he is always on the move.

Bị động ở dạng động từ khuyết thiếu:$S+can be+VpII+.....(by+O)$

2.We must take a good care of book from the library

`->` A good care of book must be taken from the library.

Bị động ở dạng động từ khuyết thiếu:$S+must be+VpII+.....(by+O)$

3.They sold one of her paintings at $1,000

`->` One of her paintings were sold at $1,000.

Bị động ở quá khứ đơn: $S+ was/were+VpII+.....+(by+O)$

4.They use milk for making butter and cheese

`->` Milk is used for making butter and cheese.

Bị động ở hiện tại đơn: $S+ be+VpII+......(by+O).$

*Cấu trúc câu bị động:

`-`Modal verbs:S+Can/Should/Must....+be+Vpp+O

`-`Past Simple:S+Was/Were+Vpp+O

`-`Present simple:S+Am/Is/Are+Vpp+O

`1`.He can never be found at home for he is always on the move

`2`.Book from the library must be taken care of

`3`.One of her paintings was sold at $1000

`4`.Milk is used for making butter and cheese

$\text{@TriLeCongTri}$

$\text{chúc em học tốt!!!!!!!}$