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1 I'm busy so i can't go out with my friends
➞ If i had free time, i could go out with my friends
2 He plays soccer well so he can take part in the Games
➞ If he plays soccer well, he can take part in the Games
3 She can't go to the party because i don't invite her
➞ If i invited her, she could go to the party
4 I can't get a job easily because I don't have a degree
➞ If i had a degree, i could get a job easily
5 He doesn't have enough money , so he doesn't buy a house
➞ If he had enough money, he would buy a house
6 It is raining heavily so we can't go to the market
➞ If it weren't raining heavily, we could go to the market
7 He will go to watch the World Cup because he is studying in Russi
➞ If he studies in Russi, he will go to watch World Cup
8 I didn't talk to him because i didn't know him
➞ If i had knonw him, i would have talked to him
9 John didn't have money so he couldn't lend you some
➞ If he had had money, he could have lent you some
10 We couldn't go out because the weather was so bad
➞If the weather hadn't been so bad, we could have gone out
11 Mary didn't wear the raincoat, so she got a cold
➞If Mary had worn the raincoast, she wouldn't have got cold
12 Marry was injured in the crash because she wasnot wearing the seat belt
➞ If Marry had been wearing the seat belt, she wouldn't have been injured in the crash
13 Carol didn't answer the phone because he was studying
➞ If Carol hadn't been studying, he would have answered
14 You didn't eat breakfast, so you are hungry now
➞If you had eaten breakfast, you wouldn't be hungry now
15 I stayed up late last night, so i feel asleep now
➞If i hadn't stayed up late last night, i wouldn't feel asleep now
16 I can't retell the film now because i didn't watch it last night
➞If i had watched the film last night, i could retell it now
17 He is tired now because he drank too much yesterday evening
➞If he hadn't drunk too much yesterday evening, he wouldn't be tired now
18 I bought the car yesterday, so I run out of money now
➝ If i hadn't bought the car yesterday, i wouldn't run out of money now
19 He didn't go to the class regularly, so he can't take part in the competition now
➞If he had gone to the class regularly, he could take part in the competition now
37. We cannot swim in this part of the river because the water is highly polluted.
38. Mr. Minh has been admired since he dedicated all his life to protecting environment.
39. Lan was sick so she didn't go to school
??? 40.A lot of Viet Namese people have the custom to buy sugar cane on New Year's Eve
37. We cannot swim in this part of the river because the water is highly polluted.
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 .
Mark the letter A, B, C or D to indicate the sentence which is closest in meaning to the given one
1. We couldn’t go out because the weather was so bad. A. It was so bad a weather that we couldn’t go out.
B. It was such a bad weather that we couldn’t go out. C. It was so bad weather that we couldn’t go out.
D. It was such bad weather that we couldn’t go out.
2. She was so busy that she couldn’t answer the phone. A. She was very busy that she couldn’t answer the phone.
B. She was too busy to answer the phone.
C. She was too busy not to answer the phone.
D. She was very busy so that she couldn’t answer the phone
Lan wasn't here,so she couldn't help me with these exercises(because)
Lan couldn't help me with these exercises because she wasn't here.
We won't rent this house because the neighborhood is noisy (so)
The neighborhood is noisy so we won't rent this house.
Mai couldn't attend the meeting because she was busy(so)
Mai was busy so she couldn't attend the meeting.
Households dump waste into the river ,so it is polluted(because)
The river is polluted because households dump waste into it.
Leaves are damaged ,so the tree can not get enough food energy to stay healthy(because)
Because the tree can not get enough food energy to stay healthy, leaves are damaged.
There are so many billboard in our city. People can not enjoy the view(If)
If there are so many billboard in our city, people can not enjoy the view.
I don't have enough money.I can not buy that car(If)
If I don't have enough money, I can not buy that car.
There are too much light in the city at night.We can not see the stars clearly(If)
If there are too much light in the city at night, we can not see the stars clearly.
Mai has a headache after work every day .She works in a noisy office(If)
If Mai works in a noisy office, she has a headache after work every day .
VI. Rewrite the following sentences as directed.
1. You must plan your work carefully. (Use passive form )
.....Your work must be planned carefully..........
2. I am very busy. I can't go with you. (Conditional sentence )
.......If I wasn't very busy, I could go with you..........
3. She didn't buy the house because the price was very high.
......If the price hadn't been very high, she would have bought the house.........
4. We couldn't sleep because the weather was hot.
......If the weather hadn't been hot, we could have slept ........
5. Mary went to bed early because she felt tired.
.......If Mary hadn't felt tired, she wouldn't have gone to bed early......
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. 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
9. Lan was busy doing the housewwork, so she didn't go to ...
Because....Lan was busy doing the housewwork, she didn't go to...