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1.The last time she saw him was him 3 months ago
=> It's 3 months since she last saw him
2.I last saw them 5 years ago
=>I have not seen them for 5 years
=>It's 5 years since I last saw them
3.They started working there 10 years ago
=>They have worked there for 10 years
4.She last read this letter 3 months ago
=>She has read this letter for 3 months
=>It's 3 months since she last read this letter
5.It's a long time since I last skipped rope
=>I have not skipped rope for a long time
6.He hasn't eaten dog meat before
=>This is the first time he has eaten gog meat
7.This is the most luxuruous hotel my family has ever lived
=>My family has never lived in such a luxurios hotel like this before
8.It is the most expensive car he has ever bought
=>He has never bought such an expensive car like that before
9.That is the worst restaurant we have ever eaten in
=>We have not eaten in such a bad restaurant like that before

1)Samuel started keeping a diary in 1997.
->Samuel has kept a diary since 1997.
2)We started learning English five years ago.
->We have learned English for fìve years
3)I began living in Ho Chi Minh city when I was 8.
->I have lived in Ho Chi Minh City since I was 8.
4)She has taught the children in this remote village for five months.
->She started teaching the children in this remote village five months ago
5)She hasn't had a swim for five years.
->She last hadn't had a swim five years ago
6)He hasn't written to me since April.
->The last time he wrote to me was 8 months ago
7)They last talked to each other two months ago.
->They haven't talked to each other for two months
8)The last time she saw her elder sister was in 1999.
-> She hasn't seen her elder sister since 1999.
9)She hasn't written to me for years.
->It's years since she didn't write to me
10)Robert and Catherine have been married for ten years.
->It's ten years since Robert and Catherine had married
11)It's two weeks since they cleaned their room.
-> They have cleaned their room for two weeks
12)It's over six months since John had his haircut.
->John has had his hair cut for over six months
13)How long is it since you rode a bicycle?
->When did you write a bike?
14)How long is it since he wrote to me?
->When did he last write to me?
15)When did he last talk to you?
->How long is it since he talked to you?
17)We have never eaten this kind of food before.
->It's the first time I have eaten that kind of food
18)This is the first time I have seen this film.
->I have never seen this film
19)John began playing the piano ten years ago.
->John has played the piano for ten years
1/Samel has kept a diary since 1997
2/we have learnt english for 5 years
3/i have lived in HCMcity since i was 8
4/she started teaching the childrenin this remote village 5 months ago
5/she last wrote 5 years ago
6/the last time he wrote wasApril ago
7/they havent talken for 2 months
8/they havent seen her elder sister since 1999
9/it is years since she last wrote to me
10/it's ten years since Robert and Catherine married
11/they have cleaned their room for 2 weeks
12/John has jised hair cutfor over 6 moths
13/when did you last ride a bycle
14/when did he last write to me
15/how long is it since he talken to you
16/how long is it since you telephoneed him
17/it is the first time i have eatten this kind of food
18/i have never seen this film before
19/John has played the piano for 10 years
20/he started giving up smoke i2 months ago

1.I began living in ho chi minh city when I was 8
-->I have LIVED IN HCM CITY SINCE I WAS 8.
2.She has taught the children in this remote village for five months.
-->she started TEACHING CHILDREN IN THIS REMOTE VILLAGE 5 MONTHS AGO.
3.He hasn't written to me since April.
-->the last time HE WROTE TO ME WAS IN APRIL.
4.She hasn't had a swim for five years.
-->she last HAD A SWIM 5 YEARS AGO.
5.They last talked to each other two months ago.
-->They haven't TALKED TO EACH OTHER FOR 2 MONTHS.
6.The last time she saw her elder sister was in 1999
-->She hasn't SEEN HER ELDER SISTER SINCE 1999.
1.I began living in ho chi minh city when I was 8
-->I have lived in Ho Chi Minh city since I was 8.
2.She has taught the children in this remote village for five months.
-->she started teaching the children in this remote village five months ago.
3.He hasn't written to me since April.
-->the last time he wrote to me was April.
4.She hasn't had a swim for five years.
-->she last had a swim five years ago.
5.They last talked to each other two months ago.
-->They haven't talked to each other for two months.
6.The last time she saw her elder sister was in 1999
-->She hasn't seen her elder sister since 1999.

1. Minh hasn't read that book since he was young/since last year/for five months.
2. She hasn't phoned her parents for nearly three weeks/since 2018.
3. I've never seen such a large kite before.
4. He is the loveliest baby she has ever seen.
5. Is this the best computer you have ?
6. Mr. Binh has recycled rubbish for two years.
1. Minh last read that book when he was young/ last year/ five months ago.
=> Minh hasn't read that book since he was young/since last year/for five months.
2. The last time she phoned her parents was nearly three weeks ago/ in 2018.
=> She hasn't phoned her parents for nearly three weeks/since 2018.
3. This is the largest kite I've ever seen.
=> I've never seen such a large kite before.
4. She hasn't seen a more lovely baby than him.
=> He is the loveliest baby she has ever seen.
5. Do you have a better computer than this one ?
=> Is this the best computer you have ?
6. Mr. Binh started recycling rubbish two years ago.
=> Mr. Binh has recycled rubbish for two years.

III/ rewrite using present perfect tense
1. She began to learn English 3 years ago
-> she has learnt English for 3 years
2. They started playing tennis when they were 6
-> they have played tennis since they were 6
3. He began to work for this company in 2002
-> my brother has worked for this company since 2002
4. He started collecting stamps 4 months ago
-> he has collected stamps for 4 months
5. The last time i saw him was 2 weeks ago
-> i haven't seen him for 2 weeks
6. The last time he visited Hue was 4 years ago
-> he hasn't visited Hue for 4 years
7. We last ate in that restaurant in January
-> we haven't eaten in that restaurant since January
8. She last came here 3 months ago
-> she hasn't come here for 3 months
9. It is a long time since i last wrote to her
-> i haven't written to her for a long time
10. It is many years since we last met out uncle
-> we haven't met our uncle for many years
11. She last wore this dress at her 14th birthday
-> she hasn't worn this dress since her 14th birthday
12. Alex began to learn Vietnamese last months
-> alex has learnt Vietnamese since last month
13. She last wrote to me 5 months ago
-> she hasn't written to me for 5 months
14. It is over 10 years since we visited Paris
-> we haven't visited Paris for over 10 years
15. The last time i went finishing was in 2004
-> i haven't gone finishing since 2004

HTHT-QKD
1. This is a first time he went abroad
-> He hasn't gone 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 met her
-> I haven't had my hair cut since i met her
5. The last time she called me was 5 months ago
-> she hasn't called me for 5 months
6. It is a long time since we last met
-> we haven't met for a long time
7. This is the first time I had such a delicious meal
-> I haven't had such a delicious meal be4
8. I haven't seen him for 8 days
-> The last time i saw him was 8 days ago
9. I haven't taken a bath since Monday
-> It is Monday since i last took a bath

1. They last talked to each other two months ago.
- They haven’t talked to each other for 2 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 tried this kind of food for years.
- It’s years since she last tried this kind of food.
4. We started looking for a job 2 months ago and we are still looking.
- We have been looking for a job for 2 months.
5. This is the first time I've been to an English club.
- I haven’t been to an English club before.
6. They have never heard such a thing before.
- This is the first time they have heard such a thing
7. When did you last telephone him?
- How long is it since you telephoned him?
8. When did you learn to drive?
- How long is it since you learned to drive?
9. The last time I went swimming was when we were in Spain.
- I haven’t gone swimming since we were in Spain.
10. We began eating when it started to rain.
- We have aten since it started to rain.
11. This is the first time I have such a delicious meal.
- I haven’t had such a delicious meal before.
12. It's 2 months since he earned any money.
- The last time he earned money was 2 months ago.
13. I last drank champagne at my brother's wedding.
- I haven’t drunk champagne since my brother's wedding.
14. We started learning English fìve years ago.
- We have learned English for 5 years.
15. How long is it since he began to write to ỵou?
- When did he begin to write to you?
16. I last ate meat 5 years ago.
- I haven’t eaten meat for 5 years.
17. It's years since I took photographs.
- I haven’t taken photographs for years.
18. I last watched TV on new year's day.
- I haven’t watched TV since new year's day.
19. It's 3 months since he wrote to me.
- He hasn’t written to me for 3 months.
20. You haven't tidied this room for weeks.
- It’s weeks since you last tidied this room.
21. This is the fìrst time I have seen this fìlm.
- I have never seen this film before.
22. When did he last talk to you?
- How long is it since he last talked to you?
23. He has not written to me since April.
- The last time he wrote to me was in April.
24. How long have you learned Spanish?
- How long ago did you learn Spanish?
25. She hasn’t had a swim for five years.
- She last swam 5 years ago.

1. They last talked to each other two months ago.
- They haven’t…talked to each other for 2 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 tried this kind of food for years.
- It’s years …since she last tried this kind of food.………
4. We started looking for a job 2 months ago and we are still looking.
- We have …been looking for a job for 2 months………..
5. This is the first time I've been to an English club.
- I haven’t …been to an English club before……..
6. They have never heard such a thing before.
- This is the first time …they have heard such a thing…..
7. When did you last telephone him?
- How long …is it since you telephoned him?…
8. When did you learn to drive?
- How long is it...since you learned to drive?.....
9. The last time I went swimming was when we were in Spain.
- I haven’t gone swimming since we were in Spain……..
10. We began eating when it started to rain.
- We have...eaten since it started to rain..
11. This is the first time I have such a delicious meal.
- I haven’t …had such a delicious meal before…..
12. It's 2 months since he earned any money.
- The last time …he earned money was 2 months ago…
13. I last drank champagne at my brother's wedding.
- I haven’t …drunk champagne since my brother's wedding……..
14. We started learning English fìve years ago.
- We have …learned English for 5 years….
15. How long is it since he began to write to ỵou?
- When …did he begin to write to you?……….
16. I last ate meat 5 years ago.
- I haven’t eaten meat for 5 years…….
17. It's years since I took photographs.
- I haven’t …taken photographs for years………..
18. I last watched TV on new year's day.
- I haven’t …watched TV since new year's day.
19. It's 3 months since he wrote to me.
- He hasn’t written to me for 3 months……
20. You haven't tidied this room for weeks.
- It’s weeks …since you last tidied this room……
21. This is the fìrst time I have seen this fìlm.
- I have never …seen this film before………..
22. When did he last talk to you?
- How long …is it since he last talked to you?………
23. He has not written to me since April.
- The last time …he wrote to me was in April……..
24. How long have you learned Spanish?
- How long ago…did you learn Spanish?……
25. She hasn’t had a swim for five years.
- She last …swam 5 years ago……….

viết lại câu sao cho không đổi nghĩa
1)this is the first time we've done this kind of work:
we have never done this kind of work before
2)I last saw him when I was a student:
I haven't seen him since I was a student
3)how long have Cathrine and henry been angaged?:
When were Cathrine and henry angaged?
4)It is ages since Alan visited his parents:
Alan hasn't visited his parents for ages
5)I haven't laughed so much for ages :
It's ages since I last laughed so much
6)John has not had his hair cut for over 6 months:
It's over 6 months since John last had his hair cut
7)I haven't spoken to her for two weeks:
the last time I spoke to her was two weeks ago
8)he fell ill on friday morning:
he has fallen ill since friday morning
9)the last time I saw her was at Peter's party
I last saw her at Peter's party
10)I haven't played tennis since 1990:
the last time I played tennis in 1990
11)I haven't been to Bristol for three years:
I last went to Bristol three years ago
12)I've never met such a famous person before
This is the first time I have met such a famous person
13)I haven't seen him since I was a student:
I last saw him when I was a student
14)I last heard from him in July:
I haven't heard from him since July
15)the last time she wrote to us was last year:
she hasn't written to us since last year
16)It's the first time she has seen that boy:
She's never seen that boy before
21. The last time we contacted was 3 months ago.
→ We …haven't contacted for 3 months ……………………….………………………………………………………
22. The last time she phoned her parents was ages ago.
→ She …..…hasn't phoned her parents for ages ……………………………………………….……………………………
23. The last time she saw her elder sister was in 1999.
→ She ……hasn't seen her elder sister since 1999……………………………. …………………………………………………
24. I have never visited Ha Long Bay before.
-> This is …the first time I have visited HLB……………………………………………………………………………..
25. I have never eaten this kind of food
=> This ……is the first time I have eaten this kind of food………………………………………………………………..…………..
EX: dùng thì HTHT để viết lại câu
21. The last time we contacted was 3 months ago.
→ We haven't contacted for 3 months.
22. The last time she phoned her parents was ages ago.
→ It's ages since she last phoned her parents.
23. The last time she saw her elder sister was in 1999.
→ She hasn't seen her elder sister since 1999…
24. I have never visited Ha Long Bay before.
-> This is the last time I visited Ha Long Bay.
5. I have never eaten this kind of food
=> This is the last time I ate this kind of food.