`1`. This flower is watered by my father every morning.
`2`. Fiona was invited to John's birthday party by him last night.
`3`. The dinner is being prepared in the kitchen by her mother.
`4`. Our teeth should be cleaned twice a day.
`5`. The English grammar has been explained by our teachers.
`6`. The accident was caused in this city by some drunk drivers.
`7`. Tom's parents will be visited by him next month.
`8`. The secretary wasn't phoned by the manager this morning.
`9`. Was this beautiful dress bought by Mary ?
`10`. These old pictures won't be hanged in the living room.
`11`. This factory wasn't bought by the German during the Second World War.
Câu bị động chung: S + to be + PII/Ved + (by + O)
Câu bị động với should: S + should + be + PII/Ved + (by + O) <câu 4>
Câu bị động cụ thể từng thì (ảnh):