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(rising intonation) or 
(falling intonation). Then practise saying them in pairs.
Rewrite sentences
1.I don't ride the bus to school every morning because it's always so crowded (If)
=> I would take the bus to school every morning if it weren't always so crowded.
2.The schoolchildren sowed some seeds, but they forgot to water them so they didn't grow (If)
=> If the schoolchildren hadn't forgotten to water the seeds, they would have grown.
3.Stop talking or you won't understand the lesson (If)
=> If you don't stop talking, you won't understand the lesson.
4.The wind is blowing hard, so we won't take the boat out for a ride (If)
=> If the wind weren't blowing hard, we would take the boat out for a ride.
5.Carol didn't answer the phone because she was studying (If)
=> If Carol hadn't been studying she would have answered the phone.
6.I feel better now because you talked to me about my problems yesterday (If)
=> I wouldn't feel better now if you hadn't talked to me about my problems yesterday.
7.Because I don't have enough free time,I can't help my mother with the housework(If)
=> If I had more free time I could help my mother with the housework.
8.Rita is exhausted today because she didn't get any last night (If)
=> Rita wouldn't be exhausted today if she had gotten some sleep last night.
9.I didn't prepare for today's lesson: So it is difficult for me to understand the teacher's explanation (If)
=> It wouldn't be difficult for me to understand the teacher's explanation if I had prepared for today's lesson.
10.'If I had any money I'd buy you a drink,' she said to me (reported speech)
=> She told me if she had had some money she would have bought me a drink.
11.'If I catch the plane I'll be home by five,'he said(reported speech)
=> He said if he caught the plane he would be home by five.
12.'You should stay in bed if you feel unwell,'my mother said (reported speech)
=> My mother advised me to stay in bed if I felt unwell.
13.'What would you do if you were having a problem with grammar,Jane?' Anne asked (reported speech)
=> Anne asked Jane what she would do if she were having a problem with grammar.
14.'I'd have been in bad trouble if Jane hadn't helped me,' he said (reported speech)
=> He said he would have been in bad trouble if Jane hadn't helped him.
15.I met her during my stay in Parist last summer (while)
=> While I was on holiday in Paris last summer, I met her.
16.MacKenzie wrote four best-sellers before he was twenty (By the age)
=> By the age of twenty, MacKenzie had written four best sellers.
17.He was crossing the road.I caught sight of him
=> I noticed him crossing the road.
18.Jimmy got into his car and drove away.I saw this
=> I saw Jim getting into his car and drove away.
19.They had a good meal and then went to dance
=> After they had had a good meal, they went to dance.
(falling intonation), 
(rising Intonation), 
(level-rising intonation), or 
(fall-rise intonation). Then listen and check. Practise saying them in pairs.
1. Could you show me the way to the Museum of History? 
2. What do you want to see during the festival? 
3. How about going on a boat trip this weekend?
4. I want to go to a vocational school after finishing secondary school.
5. Would you like to go to the cinema with me?
6. Why don’t you join the cooking classes?
7. During my trip, I visited a historic monument, an ancient pagoda, and an old village.
8. Are you good at time management?
1. It rained heanily yesterday so we couldn't play football
=> We couldn't play football because it rained heavily yesterday.
2. I won't buy this bike because i dont't have enough money
=> I don't have enough money so I won't buy this bike.
3. Study hander or you will fail the final exam
=> If you study harded, you will not fail the final exam.
4. They don't visit me because he didn't know i was will
=> He didn't know I was ill so they don't visit me.
5. I didn't go to the party because i had a cold
=> I had a cold so I didn't go to the party.
(rising intonation) or 
(falling intonation). Then practise saying them in pairs.
Rewrite these sentences using an if construction
1. I did't see the signal so Idid't stop
=> If I had seen the signal, I would have stopped.
2.she did't know you were in hospital so she didn't visit you
=> If she had known you were in hospital, she would have visited you.
3. I did't know your number so I didn't ring
=> If I had known your number, I would have rung.
4.We only came by bus because there were no taxis
=> If there had been some taxis, we wouldn't have come by bus.
5.She didn't speak to him possible because she was so shy
=> If she hadn't been so shy, she would have spoken to him.
6. Landlord: She threatened to set fire to her flat ; that's the only reason I askeed her to leave
=> If she hadn't threatened him, he wouldn't have asked her to leave.
7' we đin't visit the musrum because we hadn't time
=> If we had time, we would have visited the museum.
8.I only came up the stairs because the lift wasn't working
=> If the lift had been working, I wouldn't come up the stairs.
9.We didn't listen carefully; perhaps that's why we made this mistake
=> If we had listened carefully, we wouldn't have made this mistake.
10'We got a lift so we reached the station in time
=> If we hadn't got a lift, we wouldn't have reached the station in time.
11 You washed it in boiling water that's why it shrank
=> If you hadn't washed it in boiling water, it wouldn't have shrunk.
12. We missted the train because we were using an out -of- date timetable
=> If we hadn't used an out of date timetable, we wouldn't have missed the train.
13His own men deserted him; that's the only reason why he failed
=> If his own men hadn't deserted him, he wouldn't have failed.
14 They were driving very quickly .That's why the accident was so terrible ư
=> If they hadn't driven very quickly, the accident wouldn't have been so terrible.
15 it was raining .That the only reason I didn't take the children to the beach
=> If it hadn't rained, I would have taken the children to the beach.
16 When I bought this house I didn't realize that in summer planes skimmed the roof very five minutes
=> If I had realized that in summer planes skimmed the roof every five minutes, I wouldn't have bought it.
17 Tom's father was on the Board'That 's the only reason he got the job
=> If Tom's father hadn't been on the board, he wouldn't have got the job.
18 He wasn't looking where he was going ,That's why he was run over
=> If he hadn't looked where he was going, he wouldn't have run over.
19 I don't like country life perhaps because I wasn't brought up in the country
=> If I had been brought up in the country, I would have liked it.
20 I didn't know he was so quarrelsome '.I'm sorry now that I invited him
=> If I had known he was so quarrelsome, I wouldn't have invited him.
Rewrite these sentences using an if construction
1. I did't see the signal so Idid't stop
=> If I had seen the singnal , I would have stopped
2.she did't know you were in hospital so she didn't visit you
=> If she had known you were in hospital, she would have visited you
3. I did't know your number so I didn't ring
=> if I had known your number , I would have rung
4.We only came by bus because there were no taxis
=> If there had been some taxis, We wouldn't have came by bus
5.She didn't speak to him possible because she was so shy
=> if she hadn't been so shy, she would have speaken to him pissible
6. Landlord: She threatened to set fire to her flat ; that's the only reason I askeed her to leave
7' we đin't visit the musrum because we hadn't time
=> If we had had time, we would have visited the musrum
8.I only came up the stairs because the lift wasn't working
=>If the lift had been working, I would have come up the stairs
9.We didn't listen carefully; perhaps that's why we made this mistake
10'We got a lift so we reached the station in time
=> If we had got a lift , we would have reached the station in time
11 You washed it in boiling water that's why it shrank
12. We missted the train because we were using an out -of- date timetable
13His own men deserted him; that's the only reason why he failed
14 They were driving very quickly .That's why the accident was so terrible ư
15 it was raining .That the only reason I didn't take the children to the beach
=> If it hadn't been raining I would have taken the childran to the beach
16 When I bought this house I didn't realize that in summer planes skimmed the roof very five minutes
=> If I had readlized that in summer planes skimmed the roof very five minutes, I would have bouht this house
17 Tom's father was on the Board'That 's the only reason he got the job
=>If tom's father had been on the board, he would have got the job
18 He wasn't looking where he was going ,That's why he was run over
=> If he hadn't run over, he would have been looing where he was going
19 I don't like country life perhaps because I wasn't brought up in the country
=>If I had brought up in the country, I would have liked coutry lifre perhaps
20 I didn't know he was so quarrelsome '.I'm sorry now that I invited him
=> If I had known ha was so quarrelsome, I would have visited him
1. They won't be able to come on Sunday.
=> It will be.........................IMPOSSIBLE FOR THEM TO COME ON SUNDAY...........................
2. The test was very difficult. He couldn't do it
=> The test was too...........DIFFICULT FOR HIM TO DO IT.................................
3. My brother can't run as fast as he used to
=> My brother used..................TO RUN FASTER THAN HE DO NOW................................
4. Son was a more skillful soccer player than Duc
=> Duc DID NOT PLAY SOCCER AS SKILLFUL AS SON...............................................................
=> Son played.........SOCCER MORE SKILLFULLY THAN DUC.................................................
5. I drink more coffee than I used to
=> I didn't................DRINK AS MUCH COFFEE AS I DO NOW...............................................
6. I don't have as many book as Lien does
=> Lien........HAS MORE BOOKS THAN I.............................................................
7. My friend and I are the same height
=> I am.....................AS TALL AS MY FRIEND.....................................................
8. I've never met a more intelligent man than him
=> He is................THE MOST INTELLIGENT MAN I HAVE EVER MET.........................................................
9. You watch tv a lot. You know much about the world
=> The more............YOU WATCH TV, THE MORE YOU KNOW ABOUT THE WORLD.......................................................
10. He likes driving more than being driven
=> He prefers..........DRIVING TO BEING DRIVEN..................................................
=> He'd rather.....DRIVE THAN BE DRIVEN.....................................................
1. They won't be able to come on Sunday.
=> It will be impossible for them to come on Sunday.
2. The test was very difficult. He couldn't do it
=> The test was too difficult for him to do.
3. My brother can't run as fast as he used to
=> My brother used to run faster than he can now.
4. Son was a more skillful soccer player than Duc
=> Duc did not play soccer as skillfully as Son.
=> Son played soccer more skillfully than Duc.
5. I drink more coffee than I used to
=> I didn't use to drink as much coffee as I do now.
6. I don't have as many book as Lien does
=> Lien has more books than I do.
7. My friend and I are the same height
=> I am the same height as my friend.
8. I've never met a more intelligent man than him
=> He is the most intelligent man I've ever met.
9. You watch tv a lot. You know much about the world
=> The more you watch TV, the more you know about the world.
10. He likes driving more than being driven
=> He prefers driving to being driven.
=> He'd rather drive than be driven.
1. I can’t find my key. You will helo me find it, won't you?
(Tôi không thể tìm thấy chìa khóa của mình. Bạn sẽ giúp tôi tìm nó, phải không?)
2. People have destroyed so many forests, haven’t they?
(Con người đã phá hoại nhiều rừng quá phải không?)
3. I haven't been to Yellowstone. I think it’s a farnous natural park in the USA, isn’t it?
(Tôi chưa từng đến Yellowstone. Tôi nghĩ rằng đó là một công viên tự nhiên xa xôi ở Hoa Kỳ, phải không?)
4. I don‘t know much about Sam. He didn't graduate from university, did he?
(Tôi không biết nhiều về Sam. Anh ấy không tốt nghiệp đại học phải không?)
1. I can’t find my key. You will helo me find it, won't you?
2. People have destroyed so many forests, haven’t they?
3. I haven't been to Yellowstone. I think it’s a farnous natural park in the USA, isn’t it?
4. I don‘t know much about Sam. He didn't graduate from university, did he?