Bị động - thì HTĐ:

(+) S + am/is/are + V3/ed 

(-) S + am/is/are + not + V3/ed 

(?) Am/Is/Are + S+ V3/ed?

place (nơi chốn) + by O + time (thời gian)

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1. This flower is watered by my father every morning.

2. The room is cleaned every day.

3. Letters are typed in the office by Mary.

4. Her telephone number isn't known.

5. A lot of money is spent on advertising every day.

6. A tree is planted by the boy.

7. Meals are cooked by my sister every day.

8. A pencil is used to draw beautiful pictures by my brother.

9. The flowers aren't watered regularly by John.

10. English is spoken all over the world.

11. Clothes are usually washed for my family by my mother.

12. Nam's homework is done every day.

13. These postcards are sent to us by our friends.

`color{orange}{~MiaMB~}`