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chia động từ :
1.we can save natural resources if we (use) use solar energy
2.he'd have a lot of friends if he (not be) wasn't so selfish
3.if it doesn't rain soon,the crop (lose) will lose
4.if these (not be) weren't electricity,people (can't) couldn't use house hold appdiances
5.unless he (study) studies hard ,he will pass the final exam
6.if the sun(stop) stopped shining ,what (happen) would happen to our planet?
7.what would you (wish) wish if a fairy (give) gave you three wishes?
8.if i (know) knew his telephone number,i'd give it to you
9.if i had a type writes i (type) would typed it myself
10.he might get fat if he (stop) stopped smoking
chia động từ :
1.we can save natural resources if we (use) -> use solar energy
2.he'd have a lot of friends if he (not be) weren't so selfish
3.if it doesn't rain soon,the crop (lose) -> will lose
4.if these (not be) -> weren't electricity,people (can't) -> couldn't use house hold appdiances
5.unless he (study) -> studies hard ,he will pass the final exam
6.if the sun(stop) -> stopped shining ,what (happen) -> would happen to our planet?
7.what you (wish) -> would you wish if a fairy (give) -> gave you three wishes?
8.if i (know) -> knew his telephone number,i'd give it to you
9.if i had a type writes i (type) -> would type it myself
10.he might get fat if he (stop) -> stopped smoking
Question I: put the verbs in brackets into the correct form.( câu điều kiện loại 1)
1. If we( recycle).......recycle..... more, we help the earth.
2. factories( not dump).......won't dump..........waster into rivers if the government fine them heavily.
3. if people travel to work by bus, there( be)..will be.... fewer car fumes.
4. we( save) ...will save.......thousands of trees if we don't waste paper.
5. if we use water carefully, more people( have)..will have..fresh water.6. if the factory( continue)........continues.... dumping poison into the lake, all the fish and other aquatic animals will die.
7. if we recycle mỏe, we( help).........will help............. the earth.
8. if people ( travel)...........travel........ to work by bus, there will be fewer car fumes.
9. we save tthusands of trees if we( not waste).................don't waste paper.
10. factories don't dump waste into rivers if the govenment( fine).......fine.......... them heavily.
Question II. put the verbs in brackets into the correct form.
1. if he( study)......studies........ harder, he can passan exam.
2. she may be late if she( not hurry)....does not hurry..............3. if you study harder, you(pass)......will pass............ the exam.
4. if you are kind to me, I(be)......will be............good to you.
5, if he( give)............gives............up smoking,as his doctor orders, he will be soon well again.
6. you( not pass)......will not pass........your driving test unless you drive more carefully.
7. he'll be ill if he( not stop).......does not stop...........worrying so much.
8. we'll go to the beach tomorrow if it( be)......is................... nice.
Question III. put the verbs in brackets into the correct form.( câu điều kiện loại 2)
1. if I were you, I(look)....would look.............. for a new place to live.
2. if Lan wasn't ill, she( join)........would join.. out tree plating activity.3. if there were fewer cars on the road, there(be).....would be................ less pollution.
4. if people really cared about the environment, they( not dump)...........wouldn't dump.......waste into the lake.
5. if there was no fresh water in the world, what(happen).....would happen........
6. if you (be)..........were.......the president, what would you do to help the environment?
1. Would you like if I . . . . closed. . . . . (close) the windows?
2 . What would happen if I. . . . .didn't do . . . (not do) that?
3. He couldn 't understand if we. . . didn't explain . . . . (not explain) more .
4. If we didn 't visit her, she. . . . . .would be . . . . . (be) very sad.
5. We. . . . .wouldn't be. . (not be) tired if we didn 't try to do that.
6. If I refused, he. . . . would be. . . . . (be) very disappointed.
7.I . . . took. . . ... . . . (take) this job if I were out of work now .
8 . You would be very upset if you. . . . . . . . .lost. . . . . . . (lose) it.
9. He would feel better if he. . . .exercised. . . . . (exercise) more.
10 . I (tell). . . .. . . would tell . . . the answer if I knew it.
11. If we. . . .didn't come . . . . (not come) she would feel lonely.
12 . If we did not take this job, we. .. .wouldn't earn . . . (not earn) a lot of money.
13. If he knew that it was dangerous, he (not come). . . didn't come. . . .
14. If you (see). . . saw. . . . . . someone drowning, what would you do?
15. If you slept under a mosquito net, you (not be). .. .wouldn't be. . . bitten so often.
16. I could get a job easily if I (have). . .had. . . . a degree.
17. If we had more rain, our crops (grow). . . .would grow. . . . faster.
18. We could save his life if we. . . found. . . . (find) him earlier.
19. He could be a medical student if he. . . tried. . . . . (try) more.
20. Would you like if I. . . . . opened. . . . . (open) the door?
21. What would happen if I. .pressed . . . (press) that botton?
22 . He might get fat if he (stop). . stopped. . smoking.
23. If he knew that it was good for his health, he (do). .would do . . .
24. If I knew that you were ill, I (go). . .would go. . to see you.
25. You would be very surprised if he (return). returned. .
26. They would not come to the party if you (not invite). . .didn't invite . . . . them.
27. What would you do if you (be). . . .were . . . . . him?
28. If I spoke English, my job (be)....would be... .. a lot easier.
29. If he (have). . . had. . . . enough money, he would buy a house.
30. If I (be). . .were. . . you, I would tell the truth. thirty first .
31.If I knew his address, I (go). . . . would go . . round and see him.
32. It 's too bad Helen isn' t here. If she (be). .were . . here, she could know what to do.
1. Would you like if I . . . . closed. . . . . (close) the windows?
2 . What would happen if I. . . . .didn't do . . . (not do) that?
3. He couldn 't understand if we. . . didn't explain . . . . (not explain) more .
4. If we didn 't visit her, she. . . . . .would be . . . . . (be) very sad.
5. We. . . . .wouldn't be. . (not be) tired if we didn 't try to do that.
6. If I refused, he. . . . would be. . . . . (be) very disappointed.
7.I . . . took. . . ... . . . (take) this job if I were out of work now .
8 . You would be very upset if you. . . . . . . . .lost. . . . . . . (lose) it.
9. He would feel better if he. . . .exercised. . . . . (exercise) more.
10 . I (tell). . . .. . . would tell . . . the answer if I knew it.
11. If we. . . .didn't come . . . . (not come) she would feel lonely.
12 . If we did not take this job, we. .. .wouldn't earn . . . (not earn) a lot of money.
13. If he knew that it was dangerous, he (not come). . . didn't come. . . .
14. If you (see). . . saw. . . . . . someone drowning, what would you do?
15. If you slept under a mosquito net, you (not be). .. .wouldn't be. . . bitten so often.
16. I could get a job easily if I (have). . .had. . . . a degree.
17. If we had more rain, our crops (grow). . . .would grow. . . . faster.
18. We could save his life if we. . . found. . . . (find) him earlier.
19. He could be a medical student if he. . . tried. . . . . (try) more.
20. Would you like if I. . . . . opened. . . . . (open) the door?
21. What would happen if I. .pressed . . . (press) that botton?
22 . He might get fat if he (stop). . stopped. . smoking.
23. If he knew that it was good for his health, he (do). .would do . . .
24. If I knew that you were ill, I (go). . .would go. . to see you.
25. You would be very surprised if he (return). returned. .
26. They would not come to the party if you (not invite). . .didn't invite . . . . them.
27. What would you do if you (be). . . .were . . . . . him?
28. If I spoke English, my job (be)....would be... .. a lot easier.
29. If he (have). . . had. . . . enough money, he would buy a house.
30. If I (be). . .were. . . you, I would tell the truth. thirty first .
31.If I knew his address, I (go). . . . would go . . round and see him.
32. It 's too bad Helen isn' t here. If she (be). .were . . here, she could know what to do.
Give the correct form of the following words:
1. If we (recycle)__recycle___ more, we will help the Earth.
2. Factories (not dump)___won't dump__ waste into rivers if the government fines them heavily.
3. If people travel to work by bus, there (be)__will be___ fewer car fumes.
4. We (save)__will save___ thousands of trees if we don't waste paper.
5. If we use water carefully, more people (have)__will have___ fresh water.
6. If the factory (continue)__continues___ dumping poison into the lake, all the fish and other aquatic animals will die.
7. If we recycle more, we (help)__will help___ the Earth.
8. If people (travel)__travel___ to work by bus, there will be fewer car fumes.
9. We save thousands of trees if we (not waste)__don't waste___ paper.
10. Factories won't dump waste into rivers if the government (fine)__fines___ them heavily.
11. If he (study)___studies__ harder, he can pass an exam.
12. She may be late if she (not hurry)__doesn't hurry___.
13. If you study harder, you (pass)__will pass___ the exam.
14. If you are kind to me, I (be)__will be___ good to you.
15. If he (give)__gives___ up smoking, as his doctor orders, he will ber soon well again.
16. You (not pass)__won't pass___ your driving test unless you drive more carefully.
17. He'll be ill if he (not stop)__doesn't stop___ worrying so much.
18. We'll go to the beach tomorrow if it (be)___is__ nice.
19. I (watch)_will be watching____ a science fiction film on TV at 9.00 tonight.
20. Look at those clouds - I think it (rain)__is going to rain___
21. We'll need (call)__to call___ him more often
22. This time next week, I (lie)__will be lying___ on the beach on Phu Quoc Island
23. By the time I (arrive)__arrived___ the airport, my husband (wait)_had waited____ for me for an hour.
24. If the strees (be not)__aren't___ watered daily, they will die.
25. Many houses (destroy)__were destroyed___ in the hurricane last night in Nghe An.
26. If the students reviewed all lessons, they (do)__would do___ the test well.
27. After the thief (leave)_had left____ the house, the police (come)___came__
28. He (not go)__didn't go___ out last night, he (stay)__stayed___ at home.
29. That room (paint)___will be being painted__ at this time next week.
30. By the time the police (come)_came____, the thief (leave)___had left__
31. After I (finish)__had finished___ the lesson, Lan went out.
32. This house (build)__was built___ in 2015.
33. Most people (leave)__had left___ before the volcano erupted.
PART 1:
1. come..will prepare
2. live...will visit
3. were...would play
4. were...would invite
5. studies....will be
6. have...will buy
7. do....will earn
8. gets...will ask
9. had hurried...would have caught
10. rains...will take
PART2
1. would come
2. rang
3. rained
4. were
5. is improved
6. had
7. would you do
8. did
9. would build
10. gives
11. is improved
12. had
13. attended
14. knew
15. studies
3.
1. had
2. attended
3. knew
4. will be
5. would come
6. studies
7. doesn't hurry
8. would you do
9. rang
10. rained
Khá mỏi tay (Chia nhỏ ra bạn ơi!!!!!!!!!!)
part1
1. come..will prepare 2. live...will visit
3. were...would play 4. were...would invite
5. studies....will be 6. have...will buy
7. do....will earn 8. gets...will ask
9. had hurried...would have caught 10. rains...will take
part 2
1. would come 2. rang 3. rained 4. were 5. is improved
6. had 7. would you do 8. did 9. would build 10. gives
11. is improved 12. had 13. attended 14. knew 15. studies
part3.
1. had 2. attended 3. knew 4. will be 5. would come
6. studies 7. doesn't hurry 8. would you do
9. rang 10. rained
dài lắm bạn ơi
Exercise 6 : Choose the best answer for each of the following sentences. 1._____have enough apples, she’ll make an apple pie this afternoon. A.Should she B. If she C. Will she D. Unless she 2.If you_____to me, you wouldn’t have got so much trouble. A. listened B. would listen C. had listened D. Would have listened 3.If you don’t know how to spell a word, you_____ look it up in the dictionary. A. must B. will C. should D. ought 4.If the sun _____, we _____for a walk. A. shines / will go B. shone / will go C. shone / would go D. had shone / would go 5.The campfire _____ if it _____ last night. A. wouldn’t be cancelled / hadn’t rained B. wouldn’t have been cancelled / hadn’t rained C. would have been cancelled / hadn’t rained D. will be cancelled / rains 6.But for our parents, we _____ successful in life. A. will never be B. would never be C. wouldn’t have be D. would have never been 7.If I _____ my wallet at home this morning, I _____ money for lunch now. A. leave / will have B. didn’t leave / would have C. hadn’t left / would have D. hadn’t left / would have had 8.It is too bad, Lam isn’t here. If he _____ here, he _____ what to do. A. were / would know B. is / will know C. had been / would have known D. was / would know 9.If we _____ the plans carefully, we would not have had so many serious mistakes. A. study B. had studied C. studied D. were studying 10.I will never talk to you again _____ you apologize me _____ your being rude. A. if / for B. unless / for C. or / of D. whether / or 11._____if you work harder, you will be sacked. A. Whether B. If C. However D. Unless 12.I think you should stop smoking. A. If I am you, I will stop smoking. B. If I were you, I will stop smoking. C. If I were you, I would stop smoking. D. If I had been you, I would stop smoking. 13.If you take the ice out of the fridge, it _____. A. vaporizes B. melts C. heats D. disappears 14.We should do something to protect water from being polluted _____we will have nothing to drink in the future. A. if B. whether C. or D. unless 15.Let’s knock on their door to see _____home. A. if they’re B. unless they’re C. whether they were D. if they were 16.Unless we _____more snow, we can’t go skiing. A. will have B. have C. have had D. had 17.You’ll fail the exam _____ you start revising. A. if B. until C. when D. unless 18.Unless you wash the car, you _____not drive it at the weekend. A. would B. could C. have to D. may 19.If Peter _____his car before the drive, he _____the problem of out of petrol. A. checked / will not get B. had checked / would not have got C. checks / will not have got D. would be checking / will not have got 20.He stepped on the mine, and it exploded. A.If he doesn’t step on the mine, it doesn’t explode. B.If he doesn’t step on the mine, it won’t explode. C.If he didn’t step on the mine, it wouldn’t explode. D.If he hadn’t stepped on the mine, it wouldn’t have exploded. 21. In my experiments, the liquid is cooled to 32ºF. It always freezes. A.If you cool the liquid to 32 degrees, it froze. B.If you cooled the liquid to 32 degrees, it would freeze. C.If you cool the liquid to 32 degrees, it will freeze. D.If you had cooled the liquid to 32 degrees, it would have frozen. 22.It may rain this afternoon. I hope it doesn’t because I don’t want the match to be cancelled. A. If it rains, the match is cancelled. B. If it rains, the match will be cancelled. C. if it rained, the match would be cancelled D. If it had rained, the match would have been cancelled. 23.Unfortunately, I don’t know Philosophy, so I can’t answer your question. A.If I know Philosophy, I can answer your question. B.If I know Philosophy, I will be able to answer your question. C.If I knew Philosophy, I would be able to answer your question. D.If I had known Philosophy, I would have been able to answer your question. 24._____ there are some more ideas, we can end the meeting now. A. If B. As if C. Unless D. In case 25.If he _____with us now, he _____ the beauty of nature of the National Park. A. is / can enjoy B. was / will enjoy C. has been / would enjoy D. were / could enjoy 26.If they had searched more carefully, they...the watch sooner. A. will find B. would find C. found D. would have found 27.If I had got up early, I _____ to have breakfast now. A. have B.I had C. would have D. would have had 28.I cannot buy a new computer _____ I save enough money. A. if B. even if C. unless D. as if 29.Most people you meet will be polite to you _____. A. if you are polite to them B. if you will be polite to them C. unless you are polite to them D. if you were polite to them 30.If you do so, it _____ the matter worse. A. makes only B. would only make C. will only make D. had only made 31.You _____ English fluently unless you practice it every day. A. will speak B. will not speak C. can speak D. did not speak 32.Hurry up _____ you will miss the bus and be late for school. A. if B. and C. or D. as 33.You will get a good seat if you _____ first. A. come B. came C. have come D. will come 34.Sam will not graduate_____. A. if he passed all the tests B. if he does not pass all the tests. C. unless he passes all the tests D. unless he had passed all the tests. 35.If I had time, I would go with you. A.I am free and surely go with you. B.I am too busy to go with you. C. I will go with you because I have time. D. I am free enough to go with you. 36.If Margaret hadn’t been wearing a seat belt, she.... Injured. A. has been B. would has been C. would be D. would have been 37.If I _____ the rain yesterday, I_____ ill. A. had not caught / would have been B. had not caught / would have not been C. have not caught / were not D. have not caught / would have been 38.He looked frightened as if he _____ a ghost. A. sees B. is seeing C. has seen D. had seen 39.What _____if there _____ a serious nuclear accident. A. will happen / was B. happens / were C. would happen / were D. would happen / had been
Lần sau bn vt thì cách ra cho dễ nhìn nhé~~~~
Choose the best answer for each of the following sentences. 1._____have enough apples, she’ll make an apple pie this afternoon. A.Should she B. If she C. Will she D. Unless she
2.If you_____to me, you wouldn’t have got so much trouble.
A. listened B. would listen C. had listened D. Would have listened
3.If you don’t know how to spell a word, you_____ look it up in the dictionary.
A. must B. will C. should D. ought
4.If the sun _____, we _____for a walk.
A. shines / will go B. shone / will go C. shone / would go D. had shone / would go
5.The campfire _____ if it _____ last night.
A. wouldn’t be cancelled / hadn’t rained B. wouldn’t have been cancelled / hadn’t rained C. would have been cancelled / hadn’t rained D. will be cancelled / rains
6.But for our parents, we _____ successful in life.
A. will never be B. would never be C. wouldn’t have be D. would have never been
7.If I _____ my wallet at home this morning, I _____ money for lunch now.
A. leave / will have B. didn’t leave / would have C. hadn’t left / would have D. hadn’t left / would have had
8.It is too bad, Lam isn’t here. If he _____ here, he _____ what to do.
A. were / would know B. is / will know C. had been / would have known D. was / would know
9.If we _____ the plans carefully, we would not have had so many serious mistakes.
A. study B. had studied C. studied D. were studying
10.I will never talk to you again _____ you apologize me _____ your being rude.
A. if / for B. unless / for C. or / of D. whether / or
Put the verbs in brackets into their correct forms!
1. I would have read the letter if I____had known_______ (know) it was from you.
2. If Tony doesn't help in the garden I_____won't finish_____ (not finish) my work in time.
3 .If you______didn't tell____ (not tell) me about Maxwell's birthday I would forget it.
4. We_____would have caught________ (catch) the train earlier if Mary had found her purse.
5. If Susan_____had learned_______ (learn) the poem she would have known the answer.
6. If it_____is_______ (be) too hot we will stop and get a cold drink.
7. If it_____didn't rain______ (not rain) today I would stay it home.
8. If the Professor spoke clearly we_______would understand___ (understand) him better.
9. If you go on talking like that we______will throw____ (throw) you out.
10. If Sasha_______went___ (go) home now he would meet his own brother.
11. If it rained, the streets_____would be_____ (be) wet.
12. If I___hadn't told_______ (not tell) Jim the address he wouldn't have found you.
13. The bird_____would have died_______ (die) if you had caught it.
14. What______would you do_____ (you, do) if you won the lottery?
15. If the weather___doesn't change______ (not change) we will reach the top of the mountain.
16. Dinner_____would be_____ (be) fine if the meat weren't cold.
17. I'm sure Benny____will come________ (come) if you wait a bit longer.
18. If you ring the bell, somebody______will answer_____ (answer) it.
19. If Bert____had seen______ (see) you, he would have talked to you.
20. You_____would have found______ (find) your ticket if you had looked into your pockets.
21. You______will fall_____ (fall) ill if you eat so much.
22. What______would have happened_____ (happen) if the door had not been opened?
23. If Chris asked you for a cigarette,_____would you give_____ (you, give) him one?
24. If you______bought____ (buy) that big car, you would need a lot of money.
25.______would you change_____ (You, change) the colour of your hair if I asked you to do so?
26. If you give me the letter, I________will post____- (post) it for you.
27. _____would you have posted_______(You, post) the letter if I had given it to you?
28. If the weather is fine, I_______will go_____ (go) swimming.
29. If you______don't work______ (not work) harder, you won't pass the exam.
30. If they_____were______ (be) rich, they would travel around the world.
31. The children_____would go_____ (go) skating if the lake were frozen.
32. What would you have done, if you____had lost_______ (lose) your handbag?
33. What will happen if you_______don't know_____ (not know) the answer?
34. She_____would have gone_____(go) on holiday, if she hadn't been ill.
35. If I_______had noticed________ (notice) you, I would have said hello.
36. If I_____were_____ (be) like you, I wouldn't watch such films.
37. If you opened your eyes, you________would see___ (see) a wonderful world.
38. People_____will live______ (live) in peace if they stop fighting.
39. If Tom drinks so much, he_____can't drive____ (cannot drive) home.
40. If we_____didn't hurry______ (not hurry) we would miss the train.
41. He_____wouldn't spend______ (not spend) so much money if he weren't a happy person.
42. ____would you have come______(You, come ), if you had had more time?
43. If Jim____had studied_____ (study) the new words he would have got a better mark.
44. If he were rich, he___could buy________ (buy) the house.
45. If you don't hurry you_____willbe______ (be) late.
46. If it wasn't so hot, we_____would play______ (play) football.
47. If I_____were_____ (be) ill, would you visit me?
48. If Sean____hadn't been________ (not be) driving so fast, the police would not have stopped him.
49.I f I had sold my house, I______would have got______ (get) 4 million pounds.
50. If I_____were_______ (be) you I would I would do it.
Put the verbs in brackets into their correct forms!
1. I would have read the letter if I______had known_____ (know) it was from you.
2. If Tony doesn't help in the garden I_____won't finish_____ (not finish) my work in time.
3 .If you_____didn't tell_____ (not tell) me about Maxwell's birthday I would forget it.
4. We______would have caught_______ (catch) the train earlier if Mary had found her purse.
5. If Susan______had learnt______ (learn) the poem she would have known the answer.
6. If it______is______ (be) too hot we will stop and get a cold drink.
7. If it______didn't rain_____ (not rain) today I wouldn't stay at home.
8. If the Professor spoke clearly we_____would_____ (understand) him better.
9. If you go on talking like that we_____will throw_____ (throw) you out.
10. If Sasha_____went_____ (go) home now he would meet his own brother.
11. If it rained, the streets_____would be_____ (be) wet.
12. If I_____hadn't told_____ (not tell) Jim the address he wouldn't have found you.
13. The bird______would have died______ (die) if you had caught it.
14. What_____would you do______ (you, do) if you won the lottery?
15. If the weather____doesn't change_____ (not change) we will reach the top of the mountain.
16. Dinner_____would be_____ (be) fine if the meat weren't cold.
17. I'm sure Benny______will come______ (come) if you wait a bit longer.
18. If you ring the bell, somebody______will answer_____ (answer) it.
19. If Bert_____had seen_____ (see) you, he would have talked to you.
20. You______would have found_____ (find) your ticket if you had looked into your pockets.
21. You______will fall_____ (fall) ill if you eat so much.
22. What_____would have happened______ (happen) if the door had not been opened?
23. If Chris asked you for a cigarette,_____would you_____ (you, give) him one?
24. If you_____bought_____ (buy) that big car, you would need a lot of money.
25.______Would you change_____ (You, change) the colour of your hair if I asked you to do so?
26. If you give me the letter, I______will post______- (post) it for you.
27. ______Would you have posted______(You, post) the letter if I had given it to you?
28. If the weather is fine, I______will go______ (go) swimming.
29. If you______don't work______ (not work) harder, you won't pass the exam.
30. If they______were_____ (be) rich, they would travel around the world.
31. The children_____would go_____ (go) skating if the lake were frozen.
32. What would you have done, if you_____had lost______ (lose) your handbag?
33. What will happen if you______don't know______ (not know) the answer?
34. She_____would have gone_____(go) on holiday, if she hadn't been ill.
35. If I_______had noticed________ (notice) you, I would have said hello.
36. If I_____were_____ (be) like you, I wouldn't watch such films.
37. If you opened your eyes, you_____would see______ (see) a wonderful world.
38. People_____will live______ (live) in peace if they stop fighting.
39. If Tom drinks so much, he____cannot drive____ (cannot drive) home.
40. If we_____didn't hurry______ (not hurry) we would miss the train.
41. He______wouldn't spend_____ (not spend) so much money if he weren't a happy person.
42. _____Would you have come_____(You, come ), if you had had more time?
43. If Jim_____had studied____ (study) the new words he would have got a better mark.
44. If he were rich, he_____would buy______ (buy) the house.
45. If you don't hurry you______will be_____ (be) late.
46. If it weren't so hot, we_____would play______ (play) football.
47. If I_____were_____ (be) ill, would you visit me?
48. If Sean______hadn't been______ (not be) driving so fast, the police would not have stopped him.
49.If I had sold my house, I______would have got______ (get) 4 million pounds.
50. If I______were______ (be) you I would do it.
chia V
1,if she (study) studies harder,he will pass the exam
2,if the sun (stop) stopped shining,what would happen to uor planet ?
3,he would have a lot of friends if he (not be ) weren't selfish
4,if lan (know) knew the answer,she would help us finish our test now
5,if we reuse botteles and cans ,we (reduce) will reduce a large number of garbage
6,if there (not be ) isn't electicity, people can't not use household appliances
7,if he (finish ) finishes the work in time ,he will go to the ball game
8,if you (turn) turn out the light,we will be in the dark
9,if you don't hurry ,we (be) will be late for work