1. Rice is grown in many countries in the world.
2. The telephone was invented by Graham Bell many years ago.
3. English is practised by Lan every day.
4. I was sent this letter by Mary two days ago.
5. Compost is made from vegetables.
6. A strange man was seen in my garden yesterday.
7. The floor is cleaned every morning.
8. These cars were made in the USA.
9. Many trees were planted in the school garden.
10. Books are often read by my father before bedtime.
11. Some comic books were bought for her brother by Lan.
12. A letter was received by my sister yesterday.
13. Electricity is used for lighting nowadays.
Bị động thì Hiện tại đơn: S (tân ngữ) + is/am/are + PP + by... (chủ ngữ)
Bị động thì Quá khứ đơn: S (tân ngữ) + was/were + PP + by... (chủ ngữ)