1. Our teeth should be cleaned twice a day.

2. This house and these cars are going to be painted by the Greens for Christmas Day.

3. The cats had been fed by Ann before she went to the cinema.

4. Are those shoes going to be repaired?

5. Have the above sentences been finished?

1 Our teeth should be cleaned twice a day 

2 This housse and these car are going to be painted by the Greens forr Christmas Day 

3 The cats had been fed by Ann before she went to the cinema.

4 Are those shoes going to be repaired ? 

5 Have the above sentences been finished ?

Giải thích : cấu trúc câu bị động : S + tobe P2 +( by O)

Cấu trúc câu bị động với các thì 

Thì tương lai gần : S + am/ is/are + going to be + P2 

Thì hiện tại hoàn thành : S + has/have + been + P2 

Thì quá khứ tiếp diễn : S + had been + P2 

Động từ khuyết thiếu : S + can/ could/ should /.... + be + P2

Nocopy