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1. our sources of energy will soon end if we don't try to save them
-> Unless we try to save them, our sources of energy will soon end.
2. There are two few glasses for everyone to have a drink.
-> We haven't got enough glasses for everyone to have a drink.
unless we try to save our sources of energy or they will soon end.
1.The library lends books to both students and teachers.
=>Both students and teachers can borrow books from the library.
2. My mother is always busy from morning till night.
=>My mother is never free from morning till night.
3. Our sources of energy will soon end if we don't try save them.
=> Unless we try to save them, our sources of energy will soon end.
Học tốt 
1. Our sources of energy will soon end if we don't try to save them
=>........If we don't try to save our sources of energy, they will soon end......
2. Barbare plays chess better than Mike
=>.........Mike plays chess is as good as Barbare does...........
Viết lại câu:
1. Our sources of energy will soon end if we don't try to save them
=>unless we try to save our sources of energy, they will soon end
2. Barbare plays chess better than Mike
=>Mike doesn't play chess as well as Barbare
Viết lại câu nghĩa không đổi:
1.Our sources of energy will soon end if we don't try to save them
=> Unless we try to save our sources of energy, they will soon end
2.Despite the silly story,many people enjoyed the film(although)
=>. Although the story is silly , many people enjoyed the film
3.Barbare plays chess beter than Mike
=>Mike doesn't play chess as well as Barbare
#Yumi
1) She has that house in 1973
2) When did you have been engaged ( Cái này không chắc nhé)
3) You have a beautiful home!
4) I haven't saw/seen ( 1 trong 2 cái ) An six months ago
5) The last time Hoa hasn't wrtitten to me
1:she has that house in1973
2:When did you have been engaged
3:You have a beatiful home
4:Ihave saw An six month ago
5:the last time Hoa has wrtitten to me
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.
Bài 3 : Viết lại câu sao cho nghĩa không đổi, dùng từ gợi ý.
1. Apple juice is her favorite drink.
=> She likes apple juice
2. How many oranges do you want?
=> How many oranges would you like ?
3. How much is a bowl of noodles?
=> How much does a bowl of noodles ?
4. There are many students in our class.
=> Our class has many students
5. Why don't we sing an English song ?
=> What about singing an English song ?
6. My sister cycles to the supermarket.
=> My sister goes to the supermarket by bike
7. A year has twelve months.
=> There are twelve moths in a year
8. He look after the sick people.
=> He takes care of sick people
9. Do you enjoy listening to music ?
=> Are you interested in listening to music ?
10. We have a two - month summer vacation.
=> Our summer vacation lasts two - months
11. We can't go to school because we are ill.
=> We are ill so we can't go to school
15. My teacher always walks to school.
=> My teacher always goes .to school on foot
..........unable to sing
........have your father worked in that factory
......driven for two months
..........we try to save our sources of energy, they will soon end