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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 
1) This is the first time he went abroad.
=> He hasn't gone abroad before
2) She started driving 1 month ago.
=> She has drived for 1 month
3) We began eating when it started to rain.
=> We have eaten since it started to rain.
4) I last had my hair cut when I left her.
=> I haven't had my hair cut since I left her.
5) The last time she kissed me was 5 months ago.
=> She hasn't kissed me for 5 months
6) It is a long time since we last met.
=> We haven't met since a long time .
7) When did you have it ?
=> How long have you had it ?
8) This is the first time I had such a delicious meal .
=> I haven't had such a delicious meal before
9) I haven't seen him for 8 days.
=> The last I saw him was 8 days ago
10) I haven't taken a bath since Monday.
=> It is
Rewrite the sentences
1. We haven't been to the concert for over a year
=>> The last time i went to the concert was over a year ago
2. We last saw our grandparents 2 years ago
=>> We haven't seen our grandparents for 2 years
3. I have never read such a romatic story
=>> This is the first time i have read such a romantic story before
4. It's nearly twenty years since my father saw my uncle
=>> My father has seen my uncle for nearly twenty years
5. The last time we went to a cinema was two years ago
=>> We haven't gone to a cinema for 2 years
6. The last time we saw him was on Monday
=>> We haven't seen him since monday
7. John hasn't had his hair cut for over six months
=>> John last had his hair cut over 6 months ago
=>> It's over 6 months since john had his hair cut
8. How long have you studied medicine ?
=>> When did you start studying medicine
9. We moved to this area 10 years ago
=>> We have moved to this area for 10 years
10. How long it is since you late saw Mary?
=>> How long have you seen Mary
11. My father stopped smoking last year
=>> My father hasn't smoked since last year
12. How long have you been teaching at this school
=>> When did you teach at this school
13. We have learnt English for 4 years
=>> We started to learn english 4 years ago
14. My father started to give up smoking last year
=>> My father has given up smoking since last year
15. They have worked in that factory since 2001
=>> Thay started to work in that factory in 2001
1.The last time we went to the concert was a year ago.
2.We haven't seen our grandparents for 2 years.
3.This is the first time I have read a romantic story.
4.My father hasn't seen my uncle for nearly twenty years.
5.We haven't gone to the cinema for two years.
6.We haven't seen him since Monday.
7.-John last had his hair cut six months ago.
-It's over six months since he last had his hair cut.
8.When did you start studying medicine?
9.We have moved to this area for 10 years.
10.How long haven't you seen Mary?
11.My father hasn't smoked since last year.
12.When did you start teaching at this school?
13.We started learning English 4 years ago.
14.My father has given up smoking since last year.
15.They started working in that factory in 2001.
Ex1 viết lại câu sao cho nghĩa không thay đổi
1.This last time she came black to her hometown was 4 years ago
=>she hasn`t....come back to her hometown for 4 years.................................................................................
2.He stared working as a bank clerk 3 months ago.
=>he has....worked as a bank clerk for 3 months.....................................................................................
3.It has been 5 years since we first flew to Singapore.
=>we have.......flown to Singapore for 5 years............................................................................
4. I last had my hair cut in November.
=>I haven`t cut my hair since November
5.The last time we called each other was 5 months ago
=>We haven`t called each other for 5 months
6.It is a long time since we last met
=>We haven`t met for a long time
7 .when did you have it?
=>How long have you had it ?
8.This is the fist time I had such a delicious meal
=>I haven`t had such a delicious meal before
9.I haven`t seen him for 8 days
=>The last time i last saw him was 8 days ago
10.To day is Saturday.I haven`t taken a bath since Wednesday.
=>It is Wednesday since i last took a bath
=>Bn này ở bẩn quá .ĐỌc c10
1.This last time she came black to her hometown was 4 years ago
=>she hasn`t....come back to her hometown for 4 years.................................................................................
2.He stared working as a bank clerk 3 months ago.
=>he has....worked as a bank clerk for 3 months.....................................................................................
3.It has been 5 years since we first flew to Singapore.
=>we have.......flown to Singapore for 5 years............................................................................
4. I last had my hair cut in November.
=>I haven`t cut my hair since November
5.The last time we called each other was 5 months ago
=>We haven`t called each other for 5 months
6.It is a long time since we last met
=>We haven`t met for a long time
7 .when did you have it?
=>How long have you had it ?
8.This is the fist time I had such a delicious meal
=>I haven`t had such a delicious meal before
9.I haven`t seen him for 8 days
=>The last time i last saw him was 8 days ago
10.To day is Saturday.I haven`t taken a bath since Wednesday.
=>It is Wednesday since i last took a bath
1. This is the first time he went abroad.
=> He hasn't went abroad before.
2. She started driving 1 month ago
=> She has driven for 1 month.
3. We began eating when it started to rain
=> We have eaten since it started to rain
4. I last had my hair cut when i left her
=> I haven't had my hair cut since i left her
5. The last time she kissed me was 5 months ago
=> She hasn't kissed me for 5 months
6. It is a long time since we last met
=> We haven't met for a long time
7. When did you have it ?
=> How long have you had it ?
8. This is the first time i such a delicicous meal.
=> I haven't such a delicicous meal before
9. I haven't seen him for 8 days
=> The last time i saw him was 8 days ago
10. I haven't taken a bath since Monday.
=> The last time i took a bath was in Monday
Mình cũng không biết có đúng hay không nên bạn cứ tham khảo thử xem nhá. Cảm ơn 
1) It is a long time since we last met.
=> We have not met for a long time
2) When did you have it ?
=> How long have you had it?
3) This is the first time I had such a delicious meal .
=> I have not had a such delicious meal before
4) I have not seen him for 8 days.
=> The last time I saw him was 8 days ago
5) I have not taken a bath since Monday for two months
=> It is two months since I last took a bath
1) It is a long time since we last met.
=> We have not met for a long time
2) When did you have it ?
=> How long have you had it?
3) This is the first time I had such a delicious meal .
=> I haven't never had a such delicious meal before
4) I have not seen him for 8 days.
=> The last time I saw him was 8 days ago
5) I have not taken a bath since Monday for two months
=> It is two months since I last took a bath
1
1 has written
2 didn't have
3 played
4 has she been
5 I have ever visited
6 Did you go
7 Have you ever been there?
8 did you,went
9 was,be
10 did you watch
2
1 we haven't seen her since Christmas day.
2This is the first time I tried this kind of food.
3 It has rained for an hour.
4 The last time that they visit their grandparents is two months ago.
5 We began studied english when we still in grade 3.
6 It's nearly two years that my sister hasn't seen her friend.
4. I haven’t mer my family since last Christmas.
=> __I last met my family last Christmas. __________________________________________________________________.
5. How long have you lived here?
=> _____When did you move here_______________________________________________________________.
6. The volunteers have provided free food and fresh water to homeless people since yesterday.
=> ______ The volunteers started providing free food and fresh water to homeless people yesterday.______________________________________________________________.
7. The doctor has quitted his job in the local hospital and moved to the central hospital for 2 days.
=> _________ The doctor quitted his job in the local hospital and moved to the central hospital 2 days ago.___________________________________________________________.
8. The children haven’t had a long vacation since last year.
=>The children last had a long vacation last year. ____________________________________________________________________.
9. They haven’t visited their parents for 3 months.
=>They last visited their parents 3 months ago ____________________________________________________________________.
10. It has been 2 years since we broke up.
=> ______We broke up 2 years ago______________________________________________________________.
4. I haven’t met my family since last Christmas.
=> The last time I met my family was last Christmas.
5. How long have you lived here?
=> When did you start to live here?
6. The volunteers have provided free food and fresh water to homeless people since yesterday.
=> The volunteers started to provide free food and fresh water to homeless people yesterday.
7. The doctor has quitted his job in the local hospital and moved to the central hospital for 2 days.
=> The doctor quitted his job in the local hospital and moved to the central hospital 2 days ago.
8. The children haven’t had a long vacation since last year.
=> The last time the children had a long vacation was last year.
9. They haven’t visited their parents for 3 months.
=> The last time they visited their parents was 3 months ago.
10. It has been 2 years since we broke up.
=> We broke up 2 years ago.