1.The last time we saw him was in 1998

⇒We haven't seen him since 1998.

2.She said:"I'm living in Hai Duong now"

⇒She said she was living in Hai Duong then.

3.There are over eight hundred stamps in Tim's collection

⇒Tim's collection has over eight hundred stamps.

4.Peter spent three hours on repairing his computer

⇒It took Peter three hours to repair his computer.

5.The John family will have a repairman fix the washing machine tomorrow

⇒The John family will have the washing machine fixed by the repairman tomorrow.

6.She is the most intelligent girl in her family

⇒No one in her family is more intelligent than her.

7.She would rather play golf than play tennis

⇒She prefers playing golf to playing tennis.

8.We have never seen a more intesting film than this

⇒This is the most interesting film we have ever seen.

9.The grass isn't dry enough for me to sit on

⇒The grass is too wet for me to sit on.

10.Your younger brother is too weak to lift that box

⇒Your brother is not strong enough to lift that box.

11.My Enghlish friend finds using chopsticks difficult

⇒My English friend isn't use to using chopsticks.

12.That car's so expensive,I don't think I can buy it

⇒It's such an expensive car that I don't think I can buy.

   Chúc bạn học tốt!!! ^^

@py

Bài làm:

1. We haven't seen him since 1998.

2. She said that she is living in Hai Duong now.

3. Tim's collection has over eight hundred stamps.

4. It took Peter three hours for repairing his computer.

5. The John family will have a fixed washing machine has repaired by a repairman.

6. No one in her family is more intelligent than her.

7. She prefers playing golf to playing tennis.

8. This is the most interesting film we have ever seen.

9. The grass is too wet for me to sit down.

10. Your brother is not strong enough to lift that box.

11. My English friend isn't good at using choopsticks.

12. It's such an expensive car and I think I can't buy it.