Câu 1 :

(1) I am often offered a cigarette

(2) A cigarette is often offered to me.

- Bị động thì hiện tại đơn : S + am/is/are + PII + (by O)

Câu 2 :

(1) She was bought a nice dress.

(2) A nice dress was bought for her

- Bị động thì quá khứ đơn : S + was/ were + PII + (by O)

Câu 3 :

(1) Will Lana be given a present by Peter?

(2) Will a present be given to Lana by Peter?

- Bị động thì tương lai đơn : Will + S + be + PII + (by O)?

Câu 4 :

(1) He was shown some samples by the salesman

(2) Some samples were shown to him by the saleman

* Bị động với hai tân ngữ :

- Chủ động : S + V + O1 + O2

-> Bị động :

* Chủ ngữ là O1 : S (O1) + to be + PII + (giới từ) + O2

* Chủ ngữ là O2 : S (O2) + to be + PII + (giới từ) + O1

1. -> I am often offered a cigarette by him

     -> A cigarette is often offered me by him

2. -> She was bought a nice dress by him

     -> A nice dress was bought for her by him

3. -> Will Lana be given a present ?

      -> Will a present be given to Lana

4. -> He was shown some samples by the salesman

     -> Some samples were shown to him by the salesman

Câu bị động : S + tobe + V3/ed ( + by + O )

           tobe tuỳ theo thì nhưng đối với will và các dạng modal Verb thì là will/modal V + be

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