1. We have lived here for 15 years
2. Minh has collected stamp since 2000
3. We started learning English 4 years ago
4. My father has given up smoking since last year
5. He started living in Hn since he was 12
6. He hasn't gone abroad before
7. I haven't had such a delicious meal before
8. He has never forgotten his bag before
9. This is the first time he has played a computer game
10. She last went out with him 2 years ago
11. I have had my hair cut since I left her
12. She hasn't kissed me for 5 months
13. The last time I have seen him was 8 days ago
14. I haven't written to my uncle since June
15. We haven't met for a long time
16. It is Monday when I last took a bath
17. We have become a close friend for a long time
18. I haven't seen her for a week?
19. How long have you had it?
20. When did you bought that car?
21. How long is it since you first saw her?
22. How long is it since you first knew her?
23. How long is it since you started working in that factory?

1. We have lived here for fifteen years. 

2. Minh has collected stamps since 2000.

3. We started to learn English 4 years ago.

4. My father hasn't smoked since last year.

5. He started living in Hanoi when he was 12.

6. He hasn't gone abroad before.

7. I haven't had such a delicious meal before.

8. He has never forgotten his bag.

9. This is the first time he has played a computer game.

10. The last time she went out with him was two years ago.

11. I haven't had my hair cut since I left her.

12. She hasn't kissed me was for 5 months.

13. The last time I saw him was 8 days ago.

14. I haven’t written to my uncle since June.

15. We haven't met each other for a long time

16. It is the first time I have taken a bath since Monday.

17. We have become close friends for a long time.

18. I haven't seen her for a week.

19. How long have you had it?

20. When did you buy this car?

21. How long have you first seen her?

22. How long have you first known her?

23. How long have you worked in that factory?