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1.keeping the environment clean is very important.-It's
=> It's very important to keep the environment clean.
2.It's three years since I last spoke to her-I haven't
=> I haven't spoken to her for three years.
3.How long is it since you used the car-When
=> When did you use the car?
4.We started living here 15 years ago-We have
=> We have lived here for 15 years.
5.We can't drink the water because it's too hot-The water isn't
=> The water isn't cool enough for is to drink.
6.It has been raining for five hours-It started
=> It started raining five years ago.
7.To help mom at home is a good activity-It is
=> It is a good activity to help mom at home.
8.I started learning English three years ago-I have
=> I have learned English for three years.
11.Sue is the most intelligent in her class.-No one
=> No one in her class is more intelligent than Sue.
13.No one has used this room for years-This room
=> This room has not been used for years .
14.This question is difficult to understand-It's
=> It's difficult to understand this question
15.Many people in the world speak English-English
=> English is spoken by many people in the world.
1. It's very important to keep the environment clean.
2. I haven't spoken to her for three years.
3.When have you used the car ?
4.We have live here for 15 years.
5.The water isn't cool enough to drink.
6.It started raining five-hours ago.
7.It is good for helping mom at home.
8.I have learnt English for 3 years.
11.No one is as intelligent as Sue.
13.This room hasn't been used for years.
14.It's difficult to understand.
15.English is spoken in the world by may people.
1, The last time we saw her was on Christmas Day.
=> We haven't seen her since chistmas 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 has rained for an hour.
4, When did you start learning English.
=> How long have you learned english?
1. Mrs An didn' t drink coffee when she was young but she s it now.
-Mrs An didn' t use to drink coffee when she was young.
2. I got up late last year, but now i get up early.
- I used to get up late last year.
3. Two years ago, my brother often played chess very well but now he doesn't .
- My brother used to play chess very well two years ago.
4. My father usually played soccer, but now he doesn' t any more .
- My father used play soccer.
5. When did you begin to study English?
- How long have you studied English?
6. How long have you studied medicine ?
- When did you begin to studied medicine?
7. When did you start to learn English?
- How long have you learnt English?
8. The last time we ate this kind of food was in January.
- We haven't eaten this kind of food since January.
9. Hoa has written to me since she moved to London.
- Hoa started to write to me since she moved to London.
~~Good luck~~
\(\left(1-\frac{1}{2}\right)\left(1-\frac{1}{3}\right)\left(1-\frac{1}{4}\right)...\left(1-\frac{1}{2012}\right)\)
\(=\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.\frac{4}{5}...\frac{2010}{2011}.\frac{2011}{2012}\)
\(=\frac{1.2.3.4...2010.2011}{2.3.4.5...2011.2012}\)
=\(=\frac{1}{2012}\)
1. The last time we saw her was on Christmas Day
=> We have not seen her since Christmas Day.
2. I haven't 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 for an hour.
4. We haven't visited my grandparents for two months
=> The last time we visited my grandparents was two months ago.
5. I have studied English for three years
=> I began studying English three years ago.
6. My brother hasn't seen his best friend for nearly five years
=> It's nearly five years since my brother last saw his best friend.
7. When did you start learning English ?
=> How long have you learnt English?
8. Jane is as tall as her older sister
=> Jane is the same height as her older sister.
9. These houses are not as large as those houses
=> Those houses are larger than these houses.
10. Your backpack is not the same as mine
=> My backpack different from yours.
11. Ba began collecting stamps three years ago
=> Ba has collected stamps for three years.
12. We started living here twenty years ago
=> We have lived here for twenty years.
13. It's five years since I last saw Nam
=> I haven't seen Nam for five years.
14. The last time she visited us was four months ago
=> She hasn't visited us for four months.
15. I know Susan, I first met her in 2006
=> I have known Susan since 2006.
16. Minh has a digital camera. He bough it in 2001
=> Minh has had a digital camera since 2001.
17. Mai plays the piano. She started when she was ten years old
=> Mai has played the piano since she was ten years old.
18. Barbara is in Ha Noi now. She arrived there five months ago
=> Barbara has arrived Ha Noi for five months.
19. They started living here last month
=> They have lived here since last month.
20. My shoes are different from yours
=> My shoes are not the same as yours.
2. This is the first time I ate this kind of food.
3. it has started raining for an hour
4. The last time we have visited my grandparents was two months ago.
5. I began studying English three years ago.
6. It's nearly five years since my brother last saw his best friend.
7. How long have you learned English?
9. Those houses are more larger than there houses.
10. My packback is different from your packback
11. Ba has collected stamps for three years.
12. We have lived here for twenty years.
13. I haven't seen Nam for five years.
14. She hasn't visited us for four months.
15. I have met Susan since 2006.
16. Minh has had a digital camera since 2001.
17. Mai has played the piano since she was ten years old.
18. Babara has arrived to Hanoi for five months.
19. They have lived here for a month.
20. My shoes are not the same as yours.
It isn't nesscary for you to go to school so early.
- You don't need to go to school so early. Hiện tại đơn
when did you start to learn english
- how long have you learnt English? Hiện tại hoàn thành
- How long has she worked for an ABC bank?
- when did she start working for an ABC bank? - Qúa khứ đơn
when did you first know that teacher?
- how long have you known that teacher? - HTHT
she started to play the guitar two months ago?
- she has played the guitar for two months. - HTHT
1,It's 3 years since I last talked to her on the phone .
-> I haven't ..talked to her on the phone for 3 years............
2, Minh began to collect stamps in 2000 .
-> Minh has collected stamps for 20 years.........
3,The last time she visited me was five months ago.
-> She hasn't .visitted me for five months.......
4, It's a long time since we last went to Australia .
-> We have .not gone to Australia for a long time.........
5, Is this the most fashionable shirt she has got ?
-> Has she .gotten the shirt more fashionable than this ? .......
6, How long is it since you made friend with Mary ?
-> When did you make friend with Mary ?..
7, How long is it they built this house ?
-> When .did they built this house.?...
8, I last saw them five months ago .
-> I have .not seen them for five months.....
9, I haven't eaten a pizza for a year .
-> The last time .I ate a pizza was a year ago..
10, I started to learn English three years ago .
-> It is .3 year since the l started lean English............
1. I last read a book on September 20 th
=> I haven't ...read a book since September 20th....
2. Sue began to be interested in healthy eating 3 years ago
=> Sue has ..been interested in healthy eating for 3 years..
3. I have never seen that play before
=> It's the first time ..I have ever seen that play....
4. The last time I saw Mai was at Lan's party
=> I haven't ..seen Mai since Lan's party..
5. When did you start learning English?
=> How long...have you learned English?..
6. I haven't had my hair cut for 2 months
=> It's ...2 months since I last had cut my hair..
7. Thank you for helping me
=> It was kind .of you to help me..
1. I haven't read a book since September 20 th.
2. Sue has been interested in healthy eating for 3 years.
3. It's the first time I have ever seen that play.
4. I haven't seen Mai since Lan's party.
5. How long have you learnt English.
6. It's 2 months since I last cut my hair.
7. It was kind of you to help me.
It has rained since I got up this moring.
I have learned English for three years.
How long have you worked here?