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1. We could do the test . It was very difficult (although)
=> Although the test was very difficult , we could do it
2.Tom couldn't go too school. He was ill ( so...that)
=> Tom was ill so that he couldn;t go to school
3.Solar anergy is cheap . It is also clean ( not only ... but also )
=> Solar energy is not only cheap but also clean
4. They arrived very late . They didn't see the beginning of the film (so...that)
=> They arrived very late so that they didn't see the beginning of the film
5.It was an expensive car . We couldn't afford to buy it(such)
=> It was such an expensive car that we couldn't afford to buy
6. There was few people at the meeting . It was cancelled(because)
=> The meeting was cancelled because there was few people at this
7.. We couldn't understand her because she spoke too fast (Therefore)
=> She spoke too fast,therefore we couldn;t understand her
8.I've meet too many people. I can't remember all their name (because)
=> I can't remember all their name because I've meet too many people
9. These exercise are very difficult . She can't do them (such...that)
=> These are such difficult exercise that she can't do them
10. It rained heavily . They went to school(despite)
=> Depite rainning heavily, they went to school
11. I can't go with you . I have a lot of work to do(Because of)
=> Because of having a lot of working, I can't go with you
1. We could do the test . It was very difficult (although)
Although the test was very difficult, we could do it
2.Tom couldn't go too school. He was ill ( so...that)
Tom was so ill that he couldn't go to school
3.Solar anergy is cheap . It is also clean ( not only ... but also )
Not only is solar energy cheap but it also clean
4. They arrived very late . They didn't see the beginning of the film (so...that)
They arrived so late that they didn't see the beginning of the film
5.It was an expensive car . We couldn't afford to buy it(such)
Such an expensive car ! We couldn't afford to buy it
6. There was few people at the meeting . It was cancelled(because)
It was cancelled because there was few people at the meeting
7.. We couldn't understand her because she spoke too fast (Therefore)
8.I've meet too many people. I can't remember all their name (because)
I can't remember all people name because I've met too many people
9. These exercise are very difficult . She can't do them (such...that)
It's such a difficult exercise that she can't do them
10. It rained heavily . They went to school(despite)
Despite heavy rain, they went to school
11. I can't go with you . I have a lot of work to do(Because of)
Because of doing a lot of work, I can't go with you
Change clauses of reas on to phrases: 1. Mary didn't go to school yesterday because she was sick. ..Because of Mary's sickness , she didn't go to school yesterday ...
2. She went to bed early because she felt tired. ..She went to bed early because of feeling tired ...
3.Ann didn't go to the circus with Betty because she had a bad cold ...Ann didn't go to the circus with Betty because of having a bad cold ..
4. John succeeded in his exam because he worked hard and methodically. ..John succeeded in his exam because of his hard and methodically work..
5. Margaret stayed home because her mother was sick. ..Margaret stayed home because of her mother 's sickness....
6. I like him because his father is kind to me. .... I like him because of his father 's kindness.
7. I can't eat these fruits because they are green. ...I can't eat these fruits because of being green..
8. I couldn’t do the test because it was difficult. .I couldn’t do the test because of its dificulty...
9. I couldn’t read the letter because it was dark. .. I couldn’t read the letter because of the darkness.
10. He came late because it rained heavily .... He came late because of the heavy rain...
Change clauses of reas on to phrases:
1. Mary didn't go to school yesterday because she was sick.
=> Mary didn't go to school yesterday because of her sickness
2. She went to bed early because she felt tired.
=> She went to bed early because of her tiredness
3.Ann didn't go to the circus with Betty because she had a bad cold
=> Ann didn't go to the circus with Betty because of her bad cold
4. John succeeded in his exam because he worked hard and methodically.
=> John succeeded in his exam because of working hard and methodically.
5. Margaret stayed home because her mother was sick.
=> Margaret stayed home because of her mother’s sickness
6. I like him because his father is kind to me.
=> Because of the kind of his father, I like him.
7. I can't eat these fruits because they are green.
=> Because of green fruits, I can't eat them.
8. I couldn’t do the test because it was difficult.
=> Because of its difficulty, I couldn't do the test .
9. I couldn’t read the letter because it was dark.
=> Because of the darkness , I couldn’t read the letter .
10. He came late because it rained heavily
=> Because of the heavy rain, He came late .
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.It's good for our health to do morning exercises every day.
2.It's unhappy to get a poor mark at any subject.
3.It's our duty to keep our schoolyard green,clean and attractive.
4.Because I was ill,I couldn't go to work yesterday.
5.We don't want to go out at night and neither does she.
6.Loan likes to eat bananas and so dose Thanh.
7.It's very sour soup
8.Because of tired I can't finish the work in time.
II. Complete the sentences with either BECAUSE or BECAUSE OF:
1. We postponed our trip because of the bad driving conditions.
2. Sue’s eyes were red because she had been swimming in a chlorinated pool.
3. We can’t visit the museum tomorrow because it isn’t open.
4. Jim had to give up jogging because of his sprained ankle. (mắt cá bong gân)
5. Because heavy fog at the airport, we had to stay in Boston an extra day.
6. Please walk carefully because the walkway is slippery (adj-trơn) when wet.
7. Thousands of Irish people emigrated to the United States because of the potato famine
(nạn đóikém/sự khan hiếm) in Ireland in the middle of the nineteenth century
8. My lecture notes(diễn thuyết) were incomplete because the instructor talked too fast.
9. Because it rained, we stayed home.
10. A tomato is classified(xếp loại) as a fruit, but most people consider it a vegetable because
it is prepared and eaten in the same way as lettuce(rau diếp), onions and other vegetables.
III. Complete the sentences with THOUGH(mặc dầu) or BECAUSE :
1. I put on sunglasses though it was a dark, cloudy day.
2. I put on sunglasses because the sun was bright.
3. Though she has a job, she doesn’t make enough money to support her four chidren.
4. Because she has a job, she is able to pay her rent and provide food her four children.
5. I’m going horseback riding with Judy this afternoon though I’m afraid of horse.
6. Though Tom didn’t know how to dance, he wanted to go the school dance because he felt lonely sitting and staring blankly at the TV while all of his friends were having fun together.
IV- BECAUSE + CLAUSE / SENTENCE / BECAUSE OF + NOUN / PHRASE
1. He is bad at English because he is very lazy.
- He is bad at English because of his laziness.
2. He didn’t come to class because he was ill.
- He didn’t come to class because of his illness.
3. Everyone likes and admires her because of her intelligence.
- Everyone likes and admires her because she is intelligent.
4. The flight 202 was delayed because the weather was bad.
- The flight 202 was delayed because of the bad weather.
5. He decided to accept the job because the salary was high.
- He decided to accept the job because of the high salary.
6. I didn’t come on time because it rained heavily.
- I didn’t come on time because of the heavy rain.
7. She smiles because she is very happy.
- She smiles because of her happiness.
8. They can’t miss the meeting because it is very important.
- They can’t miss the meeting because of its importance.
9. I was late for the meeting because the traffic was heavy.
- I was late for the meeting because of the heavy traffic.
10. My grandmother can’t work hard because she is very old.
- My grandmother can’t work hard because of her old age.
11. He likes her because she’s very beautiful and attractive.
- He likes her because of her beauty and atraction.
12. He didn’t go to school because he was very poor.
- He didn’t go to school because of his poorness.
13. He broke the glass because he was careless.
- He broke the glass because of his carelessness.
14. He left school because his life was hard.
- He left school because of his hard life.
15. My little brother can’t chew well because of his toothache.
- My little brother can’t chew well because he has a toothache.
16. I can’t play basketball because of my height.
- I can’t play basketball because I'm heavy.
17. We can’t swim in this part of the river because of highly polluted water.
- We can’t swim in this part of the river because the water is highly polluted.
18. We spent the whole day in the garden because of lovely weather.
- We spent the whole day in the garden because the weather was lovely.
19. Two cars can’t pass each other because of the narrow road.
- Two cars can’t pass each other because the road is narrow.
20. Nobody can do this test because of its difficulty.
- Nobody can do this test because it's difficult.
1. Becase it was raining heavily, we had to stay at home.
It was raing heavily, so that we had to stay at home
2. Everyday thousands of trees are cut down in the world.
Everyday people cut thousands of trees down in the world
3. People think that doing morning exercises is good for health.
It is good for health to do morning exercises
4. It is interesting to go swimming in the rivers in the summer.
Going swimming in the rivers in the summer is interesting
5. Let’s play table tennis togrther in the afternoon.
Shall we play table tennis together in the afternoon ?
6. She didn’t see her at all.
She............................................... .................................................. ...............
7. The sister asked” Are you hungry, Tom?”
The sister asked Tom if he was hungry
8.It is dangerous to walk home late in the evening.
Walkinghome late in the evening is dangerous
1. Because it was raining heavily, we had to stay at home.
=> It was raing heavily, so we had to stay at home.
2. Every day thousands of trees are cut down in the world.
=> Everyday people cut down thousands of trees in the world.
3. People think that doing morning exercises is good for healthy.
=> It is thought that doing morning exercises is good for healthy.
4. It is interesting to go swimming in the rivers in the summer.
=>Going swimming in the rivers in the summer is interesting.
5. Let's play table tennis together in the afternoon.
=>Shall we play table tennis together in the afternoon ?
6. She đin't see her at all.
=>She wasn't seen by her at all.
7. The sister asked :" Are you hungery, Tom"
=> The sister asked Tom if he was hungry.
8. It is dangerous to walk home late in the evening.
=> Walking..........
1.why didn't your brother go to work yesterday.
---> why was your brother absent form work yesterday?
2. we couldn't drive fast because of the heavy rain .
---> the heavy rain prevented us from driving.
3.he is the worst soccer player in his team .
--->no one in his team plays soccer worse than him.
4. because she was tired , she couldn't finish her homework last night.
--->because of her tiredness, she couldn't finish her homework last night.
5. he / rather /eat /out/cook/home
--->He'd rather eat out than cook at home.
6. players / take / ten / minute /rest / every hour / play / as / they / become / tired / or dizzy
--->Players should take a ten-minute rest every hour they play because they can become tired or dizzy.
7. why / not / ring up / police /tell / them / that / incident
--->Why don't you ring up the police andtell them about that incident?
8. the children / rehearse / play/ school / anniversary / celebration/ Town Hall / moment
--->The children are rehearsing a play for school anniversary celebration at Town Hall at the moment.
Viết lại câu;
1. He isn't very rich but he always helps the poor.
-> Although he isn't very rich ,he always helps the poor.
2. Nam and Quan got bad marks because they were very lazy.
-> Because of their laziness, Nam and Quan got bad marks
3. He passed the exam because he worked very hard.
->He worked very hard so He passed the exam
4. We were late for school because of the heavy rain.
-> As it was raining, We were late for school
5. Hai is very tired, but he has to finish his homework.
-. Although Hai is very tired,he has to finish his homework.
6. Although Mai is having a flu, she has to go to school to take her exams.
-> Despite her flu, mai has to go to school to take her exams.
7.He used to get bad grades at Math because he was lazy.
-> Because of his laziness, He used to get bad grades at Math
8. Although the weather was terrible, they had to go to work.
-> In spite of teribel weather, they had to go to work.
9. Because of her illness, Hoa couldn't go to school yesterday.
-> Hoa couldn't go to school yesterday because she was ill
10.Although Mr. Nam was very busy he helped his son with homework every night.
-> Mr. Nam helped his son with homework every night despite his business
I. Make questions for the following sentences based on the underlined words.
1. She is unhappy because her grades in Maths are so bad.
Why is she unhappy?
2. My sister looked tired because she had too many exercises to do.
Why did your sister look tired?
3. We mustn't let the children play in the kichen because it is sometimes a dangerous place.
Why mustn't we let the children play in the kitchen?
4. She didn't feel well because she ate too much meat.
Why didn't she fell well?
5. I can't buy those books because I don't have enough money.
Why can't you buy those books?
6. They were wet because it rained heavily.
Why were they wet?
7. My sister stayed at home yesterday because she felt sick.
Why did your sister stay at home yesterday?
8. I did not travel by train because the weather was so bad.
Why didn't you travel by train?
9. The man had to leave the office immediately because he did not feel well.
Why did the man have to leave the office immediately?
10. They wear warm clothes because it is cold.
Why do they wear warm clothes?
2. Nam could do his homework himself as it was not so difficult.
=> Why ____did Nam can do his homework himself____?
Câu này nghe sao sao ấy nhở
3. They go swimming every afternoon because it is hot.
=> Why ___do they go swimming everyafternoon________?
4. We can’t go out because it is snowing heavily at the moment.
=> Why____do they go out at the moment_________?
5. She was home late yesterday because she had a lot of things to do at school.
=> Why____did she go home late yesterday___?
cảm ơn bạn nha !!!