Đáp án:

1. seen Nam for three years.

2. visited me for five months.

3. since we last went to My Son.

4. traveled abroad two years ago.

5. to write to me when she moved to London.

6. met Uncle Tam for three years.

7. eaten this kind of food since January.

8. have you learned English?

9. did you study medicine?

10. have you studied English?

11. to play soccer.

12. used to play chess very well.

13. to get up late last year.

14. to drink coffee when she was young. 

    Chúc bạn học tốt =))
        -Minhh-

=>
1. I haven't seen Nam for three years.
2. She hasn't visited me for five months.
It's five months since she last visited me.
3. It's three years since we last went to My Son.
4. I last traveled abroad two years ago.
5. Hoa started to write to me when she moved to London.
6. We haven't met Uncle Tam for three years.
7. We haven't eaten this kind of food since January.
8. How long have you leanred English?
9. When did you study medicine?
10. How long have you studied English?
11. My father used to play soccer.
12. My brother used to play chess very well.
13. I used to get up late last year.
14. Mrs An didn't use to drink coffee when she was young.