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1. I lose the key, so I cannot get into the house.
-> If I didn't lose the key, I could get into the house.
2. They are too young to join the army.
-> They are not old enough to join the army.
3. She won't come unless you invite her
-> If you don't invite her, she won't come.
4. We can't hang the picture on the wall. It is heavy.
-> The picture too heavy to hang on the wall
5. They were tired. They were hungry.
-> They were not only tired but also hungry
6. They finish their work. They went home.
-> Finishing their work then they went home
7. She goes out in the rain. She gets wet.
-> If she didn't go out in the rain, she wouldn't get wet
8. Tom can't lift the table. He isn't strong enough.
-> Tom is too weak to lift the table
1. I lose the key, so I cannot get into the house.
-> If I didn't lose the key , I could get into the house
2. They are too young to join the army.
-> They are not old enough to join the army .
3. She won't come unless you invite her
-> If you don't invite her , she won't come
4. We can't hang the picture on the wall. It is heavy.
-> The picture is too heavy for us to hang on the wall .
5. They were tired. They were hungry.
-> They were not only tired but also hungry .
6. They finish their work. They went home.
-> Finishing their work , then they went home .
7. She goes out in the rain. She gets wet.
-> If she didn't go out , she wouldn't get wet .
8. Tom can't lift the table. He isn't strong enough.
-> Tom isn't strong enough to lift the table
1.Yes,she did
2.He wanted to see Cinderella again and went to every house in the capital until he found that the shoe was the right size for Cinderella
3.No,it isn’t
1. Yes, she did
2. The prince wanted to see her again and went to every house in the capitaluntil he found that the shoe was the right size for Cinderella
3.No, this is a fairy tale
1. He wasn't very experienced. He couldn't do the job.
→ He was not experienced enough to do the job.
2. She can't ride a motorbike because she is too young.
→ She is not old enough to ride a motorbike.
3. The boy is too young. He doesn't understand it.
→ The boy is not old enough to understand it.
4. You can't put this book in your pocket because it is too big.
→ It is such a big pocket that you can't put this book in it.
5. The weather isn't very warm. We can't go swimming.
→ The weather is not warm enough for us to go swimming.
6. I am very lucky because I have many good friends.
→ I am so lucky that I have many good friends.
7. This exercise is too difficult for me to do.
→ This exercise is not easy enough for me to do.
8. He is too young to drive a car.
→ He is not old enough to drive a car.
9. The book was so interesying that I read it twice.
→ It is such an interesting book that I read it twice.
10. It is such cold water that you can't go swimming today.
→ The water is so cold that you can't go swimming today.
11. The ladder wasn't very long. It didn't reach the window.
→ The ladder wasn't long enough to reach the window.
Chúc bạn học tốt ^^
Ex1: Rewrite the following sentences so that the second sentence means exactly the same as the sentence before it:
1. Although she was not beautiful, she took part in a beauty contest.
-> She wasn't beautiful but she took part in a beauty contest.
2. It was raining, so we decided to postpone our camping.
-> Since it was raining, we decided to postpone our camping.
3. She wants them to sing a song.
-> She suggests they should singing a song.
4. She couldn't come to class because of her illness.
-> As she was ill, she couldn't come to class.
5. She couldn't join us because she was busy.
-> She was busy, so she couldn't join us.
6. Because of having a lot of difficulties, she managed to sell the house.
-> As she had a lot of difficulties, she managed to sell house.
7. Shall we go to the cinema tonight ?
-> What about going to the cinema tonight?
8. They requested us to leave the place at once.
-> They suggested we leaving the place at once.
9. I stay at home because it is raining.
-> As it is raining, I stay at home.
10. She was tired and therefore wanted to go home.
-> She wanted to go home because of tiring
Ex2: Complete the sentences using and / but / so / or / because:
1. I like Linda very much ..but... I don't like her brother.
2. I'd like to live somewhere by the Mediterranean ..because... I love the Sun.
3. We enjoy learning English ....so..... we find it very difficult.
4. I can't go out tonight ....because..... I am short of money.
5. She went to the theatre last night ....and.... had a wonderful time.
6. They can't walk home ......because...... it is very dark.
7. Would you like to drink milk .....or....coffee ?
8. It's raining heavily, ....so.... I can't go out.
9. He did the tests well ...and...I did, too.
10. His life was hard ....but... he studied very well.
Ex3: Use connectives to combine each pair of the sentences:
1. He is very tired. He has to finish his homework. (but)
-> He is very tired but he has to finish his homework.
2. The room is very small. It's quite comfortable. (although)
-> Althought the room is small, it's quite comfortable.
3. They went for a walk. The weather was bad. (but)
-> The weather was bad but they went for a walk.
4. Our teacher didn't arrive late. The traffic was terrible. (although)
-> Althought the trafic was terrible, our teacher didn't arive late.
5. I like watching TV. I like going to the cinema. (and)
-> I like watching TV and going to the cinema.
6. She wears glasses. She wants to see better. (because)
-> She wears glasses because she wants to see better.
Study well. 
1. He is very tired. He has to finish his homework. (but)
-> He is very tired but he has to finish his homework.
2. The room is very small. It's quite comfortable. (although)
->Although the room is very small, It's quite comfortable.
3. They went for a walk. The weather was bad. (but)
-> The weather was bad but they went for a walk.
4. Our teacher didn't arrive late. The traffic was terrible. (although)
-> Although the traffic was terrible, our teacher didn't arrive late.
5. I like watching TV. I like going to the cinema. (and)
-> I like watching TV and going to the cinema.
6. She wears glasses. She wants to see better. (because)
-> She wears glasses because she wants to see better.
1.She can't go to see that film, She is too young (too)
2.The girl is very clever.She can mend enough this shirt (enough)
3.I can't do this exercise.It is enough difficult
4. This shirt is too small.I can't toowear it (too)
5.Althuogh The water is very hot. lan can drink it. (although)
6. Because His family is very poor. He goes to school on foot (because)
7. Huong couldn't go to school because She was very tired. (because)
8.That man is enough old. He can't drive a car. (enough)
9. I can't talk to you now because. I'm too busy ( too)
10. Athough They have a lot of money. They live in a small house (although)
COMBINE THESE TWO SENTENCES INTO ONE:
1.She can't go to see that film.She is very young (too)
=> She is too young to go to see that film .
2.The girl is very clver.She can mend this shirt (enough)
=> The girl is clever enough to mend this shirt .
3.I can't do this exercise.It is too difficult(enough)
=> It is difficult enough for me to do this exercise .
4. This shirt is too small.I can't wear it (too)
=> This shirt is too small for me to wear ,
5. The water is very hot. lan can drink it. (although)
=> Although the water is very hot , lan can drink it .
6. His family is very poor. He goes to school on foot (because)
=> Because his family is very poor , he goes to school on foot .
7. Huong couldn't go to school. She was very tired. (because)
=> Because Huong was very tired , she couldn't go to school .
8.That man is very old. He can't drive a car. (enough)
=> That man is old enough to drive a car .
9. I can't talk to you now because. I'm very busy ( too)
=> I am too busy to talk to you now .
10. They have a lot of money. They live in a small house (although)
=> Although they have a lot of money , they live in a small house .
1. Where is your mother? – She is in the kitchen. She __is cooking____(cook) the dinner.
2. did Your brother often __go____ (go) to school by bus last year?
3. He often played football when he (be).......was..............young.
4. Trung is learning to play the guitar. He (have)....has...............guitar lessons twice a week.
5. Look! The plane (fly)............is flying................ toward to the airport. It (land)...........is landing...............
1 using a computer is very simple
-> it is............very simple to use a computer..................
2 Nobody helped him repair the bike
-> he repaired..............the bike by himself ......................
3 you aren't allowed to come to class late
-> You mustn't...............come to class late..................
4 No one helped Tuan repair the bicycle
-> Tuan.....................wasn't helped to repair the bicycle.................
5 There will be 20 people but we only have 10 chairs
-> we don't........................have enough chairs for 20 people..................................
6 it isn't necessary for you to go school so early
-> You don't..................need/have to go to school so early....................
7 Nobody helps Nam paint the house
-> Nam..................isn't helped to paint the house................
8 She should not eat so many sweet things
-> she ought.............not to eat so many sweet things...................
9 it isn't necessary for you to finish the work today
-> You don't..........................have to/ need to finish the work today........................................
10 I couldn't buy that house because it was expensive
-> That house wasn't...........cheap enough for me to buy .................
11 she knows little French , so she can't read a newspaper in French
->she doesn't know.............enough French to read a newspaper in French.................
12 you aren't allowed to make noise in the library
-> you mustn't...............make noise in the library.................
1. The water was so cold that the children could not swim in it .
-> the water was not warrm enough for the children to swim in it.
2. he acted sowell that the audiena was moved to tears.
-> he acted well enough for the audience to be moved to tears.
3. she isn't very intelligent so she can't do that exerase.
-> she isn't intelligent enough to do that exercise.
4. the paper mill is very large so it can satisfy the need of the whole country
-> the paper mill is large enough to satisfy the need of the whole country.
5. those exercises are easy enough so that sould finish them in half an hour
-> those exercises are easy enough to finish them in half an hour.
6. the policeman could not run very fasst , so he was unable to catch the burglar .
-> the policeman couldn't run fast enough to catch the burglar.
7. there is not much beer so you can't all have a drink .
-> there isn't enough beer for all you to have a drink.
8. i'm very tired so i must go to bed early.
-> i'm tired enough to go to bed early.
9. Peter is too young to watch TV
-> Peter isn't old enough to watch TV.
Sentences for practice.
1. The water was so cold that the children could not swim in it .
-> The water was not warm enough for childen to swim in it.
2. he acted so well that the audiences was moved to tears.
-> He acted well enough for the audiences to move to tears.
3. she isn't very intelligent so she can't do that exercise.
-> She isn't intelligent enough to do that exercise.
4. the paper mill is very large so it can satisfy the need of the whole country
-> The paper mill is large enough to satisfy the need of the whole country.
5. those exercises are easy enough so that I could finish them in half an hour
-> Those exercises are easy enough to finish in half an hour.
6. the policeman could not run very fasst , so he was unable to catch the burglar .
-> The policeman couldn't run fast enough to catch the burglar.
7. there is not much beer so you can't all have a drink .
-> There isn't enough for you all to have a drink.
8. i'm very tired so i must go to bed early.
-> I'm tired enough to go to bed early.
9. Peter is too young to watch TV
-> Peter isn't old enough to watch TV.
1. She is too young to stay home alone.
2. Nam is too young to drive a motorbike.
3. She has not played the guitar since last year.
4. It's interesting to learn English at school.
7. I did my homework by myself.
8. She did her housework by herself.