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1 The last time I cooked was 3 years ago.
-> I haven't cooked for 3 years
2 When did you buy that bag?
->When have you bought that bag
3 I last saw him 2 days ago
->I haven't seen him for 2 days
4 I started writing blog 2 months ago
->I haven't written blog for 2 months
5 she began living in Danang when she was child
->She has lived in Da Nang since she was a child
6 It is 5 years since i last visit my grandparents
->I haven't visited my grandparents for 5 years
7 when did you start loving him
->How long have you loved him
8 The last time I went to bar was 6 years ago
->I haven't gone to bar for 6 years
9 it's years since she wrote to me
->She hasn't written to me for years
10 I last too a bath 2 days ago
->I haven't taken a bath for 2 days
1 I haven't cooked for 3 years
2 How long have you bought that bag?
3 I haven't seen him for 2 days
4 I have written blog for 2 months
5 She has lived in Da Nang since she was child
6 I haven't visited my grandparents for 5 years
Ex1. Past Simple-> Present Perfect
1. I didn’t call her up 2 days ago. I haven’t called her up for 2 days
2. Did you finish the test an hour ago? Have you finished the test for an hour?
3. I started playing tennis last year. I’ve played tennis last year
4. He began to use the computer when he was 19. He has used the computer since he was 19
5. She didn’t learn hard in 2005. She hasn’t learned hard since 2005
6. Peter watched this film when he came home. Peter has watched this film since he came home
7. It’s a week since I last saw her. I haven’t seen her for a week
8. The boy began playing soccer a year ago. The boys have played soccer for a year
9. When did you first see her? How long have you seen her?
10. The last time we saw her was 2 months ago. We haven’t seen her for 2 months
11. Tom did not work here when I met him on the street. Tom has worked here since I met him on the street
12. When did you first know her? How long have you known her?
hình như mk đã tl cho bạn trên h rồi thì phải
Ex1. Past Simple-> Present Perfect
1. I didn’t call her up 2 days ago. I haven’t called her up for 2 days
2. Did you finish the test an hour ago? Have you finished the test for an hour?
3. I started playing tennis last year. I’ve played tennis since last year
4. He began to use the computer when he was 19. He has used the computer since he was 19
5. She didn’t learn hard in 2005. She hasn’t learned hard since 2005
6. Peter watched this film when he came home. Peter has watched this film since he came home
7. It’s a week since I last saw her. I haven’t seen her for a week
8. The boy began playing soccer a year ago. The boys have played soccer for a year
9. When did you first see her? How long have you seen her?
10. The last time we saw her was 2 months ago. We haven’t seen her for 2 months
11. Tom did not work here when I met him on the street. Tom has not worked since I met him on the street
12. When did you first know her? How long have you known her?
Tham Khảo
1. We haven't seen her since Christmas day.
2. This is the first time I ate this kind of food.
3. It has been an hour since It started raining.
4. The last time we visited my grandfather was two months.
5. I began studying English for three years.
6. It's 5 years since my brother saw his best frriend.
7. How long have you learnt English ?
8. We have lived here for fifteen years.
9. She hasn't visited me for five years.
10. I haven't written to my uncle since July.
11. We have become close friend for a long time.
12. Minh has collected stampes since 2000.
1. The last time we saw her was on Christmas day.
=> We haven't seen her since Christmas day.
2. I haven't eaten this kind of food before
=> This is the first I have eaten this kind of food.
3. It started raining an hour ago
=> It have rained for an hour.
4.We haven't visited our grandfather for two months
=> The last time we visited our grandfather was two months ago.
5. I have studied English for three years
=> I started to studied English three years ago.
6. My brother hasn't seen his best friend for nearly five years
=> The last time my brother saw his best friend was nearly five years ago.
7. When did you start learning English?
=> When have you learned English?
8. We started living here fifteen years ago
=> We have lived here for fifteen years.
9. The last time she visited me was five years ago
=> She hasn't visited me for five years.
10. I last wrote to my uncle in July
=> I haven't written to my uncle since July.
11. It's long time since we became closed friend
=> We have become closed friend for long time.
12. Minh began to collect stamps in 2000
=> Minh have begun to collect stamps since 2000
Câu cuối mình nhầm chút ^^
Sửa lại : Minh has ................
1.They last talked to each other two months ago. ---> They haven't talked to each other for two months.
2.The last time she saw her elder sister was in 1999. --->She hasn't seen her elder sister since 1999.
3.She hasn't written to me for years.---> It's years since she wrote to me.
4.Robert and Catherine have been married for ten years.--->It's ten years Robert and Catherine married.
5.It's two weeks since they deaned their room.----->They haven't cleaned their room for two weeks.
6.It's over six months since John had his hair cut.---->John has had his hair cut for over six months.
7.how long is it since he wrote to you?--->When was the last time he wrote to you?
8.I last had my hair cut when I left her.--->I haven't had a new hair cut since I left her.
9.The last time she kissed me was 5 months ago.--->She hasn't kissed me for 5 months.
10.It is a long time since we last met.--->We haven't met for a long time.
11.I haven't seen him for 8 days.-->The last time I saw him was 8 days ago.
12.I haven't taken a bath since Monday.-->It is last Monday since I took a bath.
13.It's 2 years since i had a punture.--->I have had a punture for 2 years.
14.It's 2 months since he earned any money.--->He has earned any money for two months.
1 , They haven't talked to each other for two months
2, she hasn't seen her elder sister since 1999
3,It's years since she wrote to me
4,It's ten years Robberts and Cathetine married
5, They haven't cleaned their room for two weeks
Chúc bạn học tốt 
\(\Rightarrow\)I haven't seen her for 2 months.
==> I haven't seen her for 2 months