BỊ ĐỘNG KÉP.

1. Khi main werb ở thời HIỆN TẠI.

Chủ động:

       People/they+ think/say/suppose/believe/consider/report...+that+clause.

--> Bị động :

     It's + thought/said/supposed/believed/considered/reported...+that+clause

(trong đó clause = S + Vinf + O)

a) Động từ trong clause ở thì HTD hoặc TLĐ:

S + am/is/are + thought/ said/supposed...+to + Vinf

  People say that he is a good doctor.

   -->It's said that he is a good doctor.

   --> He is said to be a good doctor.

b) Động từ trong clause ở thì QKD hoặc HTHT:

S + am/is/are + thought/ said/supposed...+to +have+ P2.

   People think he stole my car.

  -->It's thought he stole my car.

  -->He is thought to have stolen my car.

2. Khi main verb ở thời QUÁ KHỨ.

Chủ động:

    People/they+though/said/supposed...+that+clause.

-->Bị động:

          It was+thought/said/said/supposed...+that+clause.

a) Động từ trong clause ở thì HTD hoặc TLĐ.

  S+ was/were + thought/said/supposed...+ to + Vinf.

  People said that he is a good doctor.

      --> It was said that he is a good doctor.

      -->He was said to be a good doctor.

b) Động từ trong clause ở thì QKD hoặc HTHT:

S + was/were + thought/ said/supposed...+to +have+ P2.

    They thought he was one of famous singers.

        --> It was thought he was one of famous singers.

        --> He was thought to be one of famous singers.

BỊ ĐỘNG CỦA TÁM ĐỘNG TỪ ĐẶC BIỆT

Các động từ: suggest. require,request,order,demand,insist(on),recommend.

Chủ động:

  S+suggest/recommend/order/require...+ that + clause. ( trong đó clause = S +Vinf +O)

--> Bị động:

It+was/will be/has been/is... + P2(of 8 verb)+that+st+be+P2.

(trong đó "be" là không đổi vì động từ trong clause ở câu chủ động dạng Vinf)

   He suggested that she buy a new car.

--> It was suggested that a new car be bought.

BỊ ĐỘNG CỦA CẤU TRÚC CHỦ NGỮ GIẢ "IT".

Chủ động

    It + be+ adj+ for sb+ to do st.

--> Bị động:

    It + be+ adj+ for sb+ to be done.

   -->It is difficult for me to finish this test in one hour

   --> It is difficult for this test to be finishes in onw hour.

1. Khi V1 chia ở các thì hiện tại như hiện tại đơn, hiện tại tiếp diễn, hiện tại hoàn thành.

S1 + V1 + that + S2 + V + …

* TH1: It is + V1-pII that + S2 + V + …

*  TH2: Khi V2 chia ở thì hiện tại đơn hoặc tương lai đơn

            S2 + is/am/are + V1-pII + to + V2(nguyên thể) +….

* TH3: Khi V2 chia ở thì quá khứ đơn hoặc hiện tại hoàn hành

 S2 + is/am/are + V1-pII + to have + V2-PII + …

Ví dụ:

They think that she works very hard.

-> It is thought that she works very hard.

-> She is thought to work very hard.

They think that she worked very hard last year.

-> It is thought that she worked very hard last year.

-> She is thought to have worked very hard last year.

2. Khi V1 chia ở các thì quá khứ (quá khứ đơn, quá khứ tiếp diễn, quá khứ hoàn thành).

            S1 + V1 + that + S2 + V + ….

* TH1: It was + V1-pII + that + S2 + V + …

* TH2: Khi V2 chia ở thì quá khứ đơn:

S2 + was/were + V1-pII + to + V2 (nguyên thể) + …

* TH3: Khi V2 chia ở thì quá khứ hoàn thành:

            S2 + was/ were + V1-pII + to + have + V2-pII + …

Ví dụ:

People said that she was very kind.

-> It was said that she was very kind.

-> She was said to be very kind.

People said that she had been very kind.

-> It was said that she had been very kind.

-> She was said to have been very kind.