This document discusses the relationship between the simple past tense and present perfect tense in English. It provides examples of sentences using simple past and how to rewrite them in the present perfect form. It then gives exercises for learners to practice transforming sentences between the two tenses. The exercises focus on contexts involving length of time, frequency of actions, or completion status related to the past or present.

1. GGG CHUYÊN ĐỀ 20: MỐI LIÊN QUAN GIỮA QUÁ KHỨ ĐƠN
VÀ HIỆN TẠI HOÀN THÀNH
I. LÍ THUYẾT
1. This is the first time I have seen him.
=> I have never seen him before.
The first time: lần đầu tiên
Never ...before : chưa bao giờ trước đây
2. I started / begun studying English 3 years ago.
=> I have studied English for 3 years.
Nếu không có ago mà có when + MĐ thì giữ nguyên MĐ chỉ đổi when thành since.
3. I last saw him when I was a student.
=> I haven't seen him since I was a student.
Last : lần cuối/ Since : từ khi
4. The last time she went out with him was two years ago.
=> She hasn't gone out with him for two years.
5. It's ten years since I last met him.
=> I haven't met him for ten years.
6. When did you buy it?
=> How long have you bought?
Mẫu này có dạng:
When: dùng quá khứ đơn
How long: dùng hiện tại hoàn thành
II. BÀI TẬP VẬN DỤNG
BT 1. Viết lại câu không thay đổi nghĩa:
1. This is the first time he went abroad.
=> He hasn't……………………….................................................................................................
2. This is the first time I had such a delicious meal.
=> I haven't......................................................................................................................................
3. She hasn’t played this game well before.
=> This is …………………………………………………………………………………………
4. She started driving 1 month ago.
=> She has.......................................................................................................................................

2. 5. We began eating when it started to rain.
=> We have.....................................................................................................................................
6. She has taught the children in this remote village for five months.
=> She started …………………………………………………………………………………….
7. I have lived in Ho Chi Minh City since I was 8.
=> I began ………………………………………………………………………………………...
8. I last had my hair cut when I left her.
=> I haven't......................................................................................................................................
9. They last talked to each other two months ago.
=> They haven’t …………………………………………………………………………………
10. She hasn’t had a swim for five years.
=> She last ………………………………………………………………………………………
11. I haven't met Linda for 2 weeks.
=> I last ………………………………………………………………………………………
12. The last time she kissed me was 5 months ago.
=> She hasn't.................................................................................................................................
13. The last time she saw her elder sister was in 1999.
=> She hasn’t ……………………………………………………………………………………
14. He hasn’t written to me since April.
=> The last time ………………………………………………………………………………..
15. I haven't seen him for 8 days.
=> The last time ……………………………………………………………………………….
16. It is a long time since we last met.
=> We haven't..............................................................................................................................
17. It is 5 years since I last visit my grandparents.
=> I haven’t …………………………………………………………………………………….
18. I haven't taken a bath since Monday.
=> It is .........................................................................................................................................
19. When did you have it?
=> How long .............................................................................................................................?

3. 20. How long have you bought that bag?
=> .When ……………………...................................................................................................?
BT 2. Chọn đáp án đúng
1. Jack has stopped writing letters to Jill.
A. Jack has no longer stopped writing letters to Jill.
B. Jack used to write letters to Jill.
C. Jack has never written letters to Jill.
D. Jack stopped writing letters to Jill when Jill come.
2. Mary has been working in this company for five years.
A. Mary began to work in this company for five years.
B. Mary began working in this company for five years ago.
C. Mary began to work in this company five years ago.
D. Mary has begun to work in this company five years ago.
3. I have never eaten this kind of food before.
A. I used to eat this kind of food before.
B. Before I came here I had ever eaten this kind of food.
C. This is the first time I have ever eaten this kind of food.
D. This is the most delicious food I have ever eaten.
4. She last saw him years ago.
A. She hasn’t seen him years ago B. She hasn’t seen him for years ago.
C. She didn’t see him for years . D. It’s years since she last saw him.
5. It’s ages since I last saw a Hollywood film.
A. It’s ages because I last saw a Hollywood film.
B. I haven’t seen any Hollywood film before.
C. I saw a last Hollywood film since ages ago.
D. I haven’t seen a Hollywood film for a long time.
6. He hasn’t smoked a cigarette for a week.
A. It is for a week that he hasn’t smoked a cigarette.
B. It is a week since he last smoked a cigarette.
C. It is a cigarette that he smoked a week ago.
D. It is a week ago that he smoked a cigarette.
7. How long have you learnt English?
A. When did you learnt English? B. When did you learn English?
C. How long is it since you learnt English? D. B & C are correct.
8. John began playing the piano 10 years ago.
A. John played the piano 10 years ago. B. John has played the piano for 10 years.
C. John used to play the piano 10 years ago. D. John doesn’t play the piano anymore.
9. She bought this book two weeks ago.
A. She has had this book for two weeks. B. She has had this book since two weeks.

4. C. She had this book for two weeks. D. She has this book for two weeks.
10. We last went to the cinema two months ago.
A. We haven’t gone to the cinema for two months.
B. We didn’t go to the cinema for two months.
C. We didn’t want to go to the cinema any more.
D. We stopped going to the cinema.
11. It’s the coldest winter they’ve everhad.
A. They’ve ever had such a cold winter.
B. They’ve ever had such cold winter
C. They’ve never had such cold winter.
D. This is the first time they had such cold winter.
12. It’s over ten years since we got married.
A. We got married for over ten years. B. We have been married for over ten years.
C. We were married for over ten years. D. We have been married since over ten years.
13. She began to play the piano three years ago.
A. She has played the piano since three years.
B. She has played the piano for three years.
C. She doesn’t play the piano now.
D. She stops playing the piano now.
14. It’s two years since he last went home.
A. He hasn’t gone home for two years. B. The last time he went home was two years ago.
C. He didn’t go home two years ago. D. Both a & b are correct.
15. We started to write each other three years ago.
A. We used to write to each other for two years.
B. We used to write to each other in two years.
C. We have written to each other for two years.
D. We have written to each other since two years.
16. The last time I saw Jim was in 2004.
A. I have seen Jim since 2004. B. I haven’t seen Jim since 2004.
C. I have seen Jim for 2004. D. Jim has been seen since 2004.
17. They have lived here for 6 years now.
A. They moved here for 6 years. B. They moved here 6 years ago.
C. They are living here for 6 years now. D. They were living here since 6 years ago.
18. Ken began working for that company 2 years ago.
A. Ken has been working for that company for two years.
B. Ken has been working for that company since two years.
C. Ken worked for that company for two years.
D. Ken was working for that company for two years.
19. I have never seensuch an interesting film before.

5. A. This is the fisrt time I have seen such an interesting film.
B. This film is the best I have ever seen.
C. This is the first time I saw such an interesting film.
D. This is the best film that I saw.
20. She hasn’t drunk coca-cola before.
A. It’s the first time she has drunk coca-cola. B. It’s time for her to drink coca-cola.
C. It’s the first time since she drank coca-cola. D. It is time she drank coca-cola.
BT 1:
1. He hasn’t gone abroad before.
2. I haven’t had a delicious meal before.
3. This is the first time she has played this game.
4. She has driven for 1 month.
5. We have eaten since it started to rain.
6. She started teaching the children in the remote village five months ago.
7. I began living in Ho Chi Minh city when I was 8.
8. I haven’t had my hair cut since I left her.
9. They haven’t talked to each other for two months.
10. She last had a swim five years ago.
11. I last met Linda two weeks ago.
12. She hasn’t kissed me for 5 months.
13. She hasn’t seen her elder sister since 1999.
14. The last time he wrote to me was April.
15. The last time I saw him was 8 days ago.
16. We haven’t met for a long time.
17. I haven’t visited my grandparents for 5 years.
18. It is Monday since I last took a bath.
19. How long have you had it?
20. When did you buy that bag?
BT 2:
1B 5D 9A 13B 17B
2C 6B 10A 14D 18A
3C 7D 11D 15C 19A
4D 8B 12B 16B 20A