11. I haven't seen her since 2007  -> it's.......... 12.I haven't been to the dentist's for 2 years -> it's........... 13. It's last year since i last heard from her -> I have......... 14. It's 2 years since i saw her -> I haven't.... 15.Na and Mi last visited their parents in 1998 -> it's...... 16. She last visited her parents in 1998 -> it's........ 17.The last time i saw him was ten years ago -> it's...... 18. They haven't phoned us for a month -> it is............ 19. They haven't seen my friend for 1 month  -> It is 1 month........... 20. John has not had his hair cut for over six months -. it is........... 21.Lan and Maryam have corresponded for 3 years -> it is 3 years ............. 22. Lan hasn't written to Maryam gor 2 months -> Lan didn't.........

Phương pháp làm:

1. Đọc và hiểu câu hỏi.
2. Xác định thời gian qua đi trong mỗi câu.
3. Sử dụng các cấu trúc và thì để diễn đạt thời gian qua đi.
4. Viết lại câu hỏi theo các cấu trúc và thì đã xác định.

Câu trả lời:

11. I haven't seen her since 2007 -> it's been 14 years since I last saw her.
Or: I haven't seen her for 14 years.

12. I haven't been to the dentist's for 2 years -> it's been 2 years since I last went to the dentist.
Or: I haven't been to the dentist's in 2 years.

13. It's last year since I last heard from her -> I haven't heard from her in the past year.

14. It's 2 years since I saw her -> I haven't seen her for 2 years.

15. Na and Mi last visited their parents in 1998 -> it's been 23 years since Na and Mi visited their parents.

16. She last visited her parents in 1998 -> it's been 23 years since she visited her parents.

17. The last time I saw him was ten years ago -> it's been ten years since I last saw him.

18. They haven't phoned us for a month -> it's been a month since they last phoned us.

19. They haven't seen my friend for 1 month -> It is 1 month since they last saw my friend.

20. John has not had his hair cut for over six months -> it's been over six months since John last had his hair cut.

21. Lan and Maryam have corresponded for 3 years -> it's been 3 years since Lan and Maryam started corresponding.

22. Lan hasn't written to Maryam for 2 months -> Lan didn't write to Maryam for 2 months.