`1.` He is known to have just been arrested in the forest.

`2.` The fire is thought to have started at about 8 o'clock.

`3.` He is believed to have been killed in the air crash.

`4.` Picasso was believed to have drawn that picture.

`5.` She is thought to have done that test very well

`6.` He is considered to be the best student in our class.

`7.` Their car was serviced. ( CBĐ : S + was/were + P2 by O )

`@` Kiến thức câu bị động không ngôi :

`-` People (they; someone) + say (said) + that  S2  V2 O2

`=>` S2 + tobe + said + to V-inf / to have P2 ( lệch thì )

`=>` It + is / was + said + that S2 V2 O2

`29`. He is known to have just been arrested in the forest.

`30`. The fire is thought to have started at about 8 o'clock.

`31`. He is believed to have been killed in the air crash.

`31`. Picasso was believed to have drawn that picture.

`32`. She is thought to have done that test very well.

`->` He is considered to be the best student in our class.

`->` They had their car serviced.

*Bị động của cấu trúc nhờ vả.

- Chủ động:

+, S + have (chia) + O (person) + V-inf + O (thing).

+, S + get (chia) + O (person) + to V + O (thing)

-> Bị động: S + have/ get (chia) + O (thing) + Vpp + (by O (person))

-----------------

*Bị động chỉ ý kiến:

- Chủ động: S1 + V1 + that + S2 + V2 (V1 chia ở các thì hiện tại: Hiện tại đơn, hiện tại tiếp diễn, hiện tại hoàn thành)

-> Bị động:

+, It + am/is/are + V1 (pp) + that + S2 + V2.

+, S2 + am/is/are + V1 (pp) + to V2

(V2 chia thì hiện tại đơn hoặc tương lai đơn)

+, S2 + am/is/are + V1 (pp) + to have V2 (pp)

(V2 chia thì quá khứ đơn hoặc hiện tại hoàn thành).

- Khi V1 chia ở các thì quá khứ:

-> S2 + was/ were + V1 (pp) + to have V2 (pp) (V2 chia ở các thì khác ngoài thì quá khứ đơn)