1.The last time we saw her was on Christmas day.
-> We have not seen her since Christmas day.
2.I have not eaten this kind of food before.
-> This is the first time I have eaten this kind of food.
3. It started raining an hour ago..
-> It has rained an hour.
4.We haven't visited my grandparents for two months.
-> The last time I visited my grandparents was 2 months ago.
5.I have stuied English for three years .
-> I began studying English 3 years ago.
6. My brother hasn't seen his best friend for nearly five years.
-> It 's nearly five years since my brother has last seen his best friend.
7.When did you start learning English ?
-> How long have you learned English?
8.The last time I saw him was in 1995.
-> I haven't seen him since 1995 / for a long time.
9.When did you begin to learn English ?
-> How long have you learned English? ( giống câu 7)
10.The last time I played tennis was in 1990.
-> I haven't played tennis since 1990.
11.It is two months since I saw her .
-> I haven't seen her for 2 months.
12.We started living here fifteen years ago.
-> We have lived here for 15 years.
13.The last time she visited me was five months ago.
-> She hasn't visited me for 5 months.
14. I last wrote to my uncle in July.
-> I haven't written to my uncle since July.
15 . Is 's long time since we became close friends.
-> We have become close friends for a long time.
16.Minh began to collect stamps in 2000.
-> Minh has collected stamps since 2000.

1.The last time we saw her was on Christmas day.
-> We have not seen her since Christmas day.
2.I have not eaten this kind of food before.
-> This is the first time I have eaten this kind of food.
3. It started raining an hour ago..
-> It has rained an hour.
4.We haven't visited my grandparents for two months.
-> The last time I visited my grandparents was 2 months ago.
5.I have stuied English for three years .
-> I began studying English 3 years ago.
6. My brother hasn't seen his best friend for nearly five years.
-> It 's nearly five years since my brother has last seen his best friend.
7.When did you start learning English ?
-> How long have you learned English?
8.The last time I saw him was in 1995.
-> I haven't seen him since 1995 / for a long time.
9.When did you begin to learn English ?
-> How long have you learned English? ( giống câu 7)
10.The last time I played tennis was in 1990.
-> I haven't played tennis since 1990.
11.It is two months since I saw her .
-> I haven't seen her for 2 months.
12.We started living here fifteen years ago.
-> We have lived here for 15 years.
13.The last time she visited me was five months ago.
-> She hasn't visited me for 5 months.
14. I last wrote to my uncle in July.
-> I haven't written to my uncle since July.
15 . Is 's long time since we became close friends.
-> We have become close friends for a long time.
16.Minh began to collect stamps in 2000.
-> Minh has collected stamps since 2000.