$@Mayumi Dojima$

`16.` The engine of the car has been repaired.

`17.` The window was broken down by the boys and took away some picture.

`18.` A lot of money is spent on advertising every day.

`19.` A story has been told by teacher.

`20.` A cake is cut with a sharp knife by Mary.

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`+` Cấu trúc câu bị động:

`-` Thì QKĐ: S + was/were + Ved/V3 + (BY  O)
`-` Thì HTĐ: S + am/is/are + Ved/V3 + (BY  O)
`-` Thì HTHT: S + have/has + been + Ved/V3 + (BY  O)

`@`  Note: Khi by + O là by us, by them, by people, by someone, by somebody, by buiders,.....thì ta bỏ đi không sử dụng trong câu bị động.   

`1.` The engine of the car has been repaired.

`2.` The window was broken and some pictures were taken away by him.

`3.` A lot of money is spent on advertising every day.

`4.` A story has been told by the teacher.

`5.` A cake is cut with a sharp knife by Mary.

`@` Câu bị động :

`+` Hiện tại đơn: S+am/is/are+ P2 + by O

`+` Hiện tại hoàn thành : S+ have/has been + P2 + by O

`+` Quá khứ đơn: S+ was/were + P2 + by O