1. We started collecting stamps in 2003.

We have collected stamps since 2003.

2. Mr Nam washes his car every week.

> His car is washed by Mr Nam every week.

3. They have repaired this bridge.

> This bridge has been repaired by them.

4. Somebody will take these boxes.

> These boxes will be taken.

5. I'm sorry I don't go to the party.

>I wish I could go to the party.

6. He began to write the novel 3 weeks

> He has written the novel for 3 weeks.

7. You ought to send that letter.

> That letter ought to be sent by you.

8. The boys played tennis last Sunday.

> Tennis was played by the boys last Sunday.

9. lam is going to meet you tomorrow. (Đã sửa)

You are going to be met by Lam tomorrow.

10. It's a pity I don't have a key.

>I wish I had a key.