1 The maid polished the silver yesterday
=> The silver was polished by the maid yesterday
Bị động quá khứ đơn : S + was/were + PII (by......)
2 We must take the dog to the vet
=> The dog must be taken to the vet
Bị động V khuyết thiếu : S + must/an/should + be + PII ( by......)
3 The mayor will open the new cinema tomorrow
=> The new cinema will be opened by the mayor tomorrow.
Bị động tương lai đơn : S + will be + PII (by......)
4 We couldn't put out the fire because of the wind
=> The fire couldn't be put out because of wind
Bị động V khuyết thiếu : S + must/an/should + be + PII ( by......)
5 Have you done the washing yet?
=> Has the washing been done yet ?
Bị động hiện tại hoàn thành : S + have/has + been + PII (by.....)