Bài tập câu điều kiện I. Use the correct form of the verbs in parentheses : a) Type 1 : 1. If the weather …………. good next weekend, we …………… away somewhere. (stay / go) 2. Come on ! If we ……………, we ………………… the bus. (hurry / catch) 3. There …………… big floods every year if the cutting down of trees continues. (be) 4. If there ……… too much litter in the streets, the environment will become polluted. (be) 5. If the sea level ………………, there will be many floods in many parts of the world. (rise) 6. They will be late for the meeting if they ………………… now. (not leave) 7. If you aren’t careful, you …………………. the plates. (drop) 8. If anyone ……………… me, please tell them I’m out. (phone) 9. If crops ………………… with pesticides, they …………… by insects in soil. (spray / destroy) 10. If he ………………. too much pesticide on vegetables, they will become edible. (not use) b) Type 2 : 1. If you ………… a king, what ………………………… ? (be / you-do) 2. You would feel better if you ………………. a short rest. (take) 3. If she ………… two years older, she ……………… part in the contest. (be / take) 4. They ………………… angry if you didn’t inform him. (be) 5. The teacher …………. disappointed if I ……………. lazy like this. (not be / not be) 6. What ……………………. if the moon …………………… ? (happen / disappear) 7. If the cats had wings, they ………………. able to fly. (be) 8. If the streets …………………, there ……………. so many accidents. (widen / not be) 9. If you broke the traffic law like him, you ………………… a fine. (get) 10.He ……………… better if he ……………… his hair dried. (look / not have) c) Type 3 : 1. If I ……………. that you were in the hospital, I …………………… you. (know / visit) 2. I shouldn’t have believed it if I …………………. with my own eyes. (not see) 3. If you …………………. ten minutes earlier, you ………………… a seat. (arrive / get) 4. If you ………………… more slowly, they ……………………. you. (speak / understand) 5. If he ………………. the instructions carefully, he ………………… in hot water. (read / wash) d) Mixed practice : 1) If I were you, I …………………………….( invite) Jack to the party. 2) She would get 100 pounds if she ……………… (sell) this old shelf. 3) If they had enough money, they……………………… ( buy) a new car. 4) If it……………………(rain), I will stay at home. 5) If the weather………………….(be) fine, the children can walk to school. 6) We…………………….( pass) the exam if we studied harder. 7) If Pat……………………… ( repair) his bike, he could go on a bicycle tour with us. 8) Walter…………………….( help) his mother in the garden if she reads him a story this evening. 9) If you come with me, I ………………….( do) the shopping with you. 10) Our teacher will be happy if we ……………………(learn) the poem by heart. 11) If we meet at 9:30, we………………….(have) plenty of time. 12) Lisa would find the milk if she…………………….( look) in the fridge. 13) The zookeeper would have punished her with a fine if she………………… (feed) the animals. 14) If you spoke louder, your classmates……………………………… (understand) you. 15) Dan……………………… (arrive) safe if he drove slowly. 16) You………………………… (have) no trouble at school if you had done your homework. 17) If you………………………( swim) in this lake, you'll shiver from cold. 18) The door will unlock if you………………….( press) the green button. 19) If Mel………………………….(ask) her teacher, he'd have answered her questions. 20) I……………………(call) the office if I were you 21) If we…………………( cycle) to Dresden, it will be a fantastic trip. 22) I……………….( miss) the school bus if I don't get up early. 23) Harriet would stay longer in Vienna if she…………………( have) more time. 24) She……………… (support) the people in Peru if she bought her coffee beans in this shop. 25) If I don't see Claire today, I……………………… (phone) her this evening. 26) If Carlos………………….( go) sailing, he'll need a life-jacket. 27) If my brother………………….( park) his car here, the traffic warden would give him a ticket. 28) You'll catch a cold if you…………………………(not wear) a pullover. 29) If you drink more of this sweet lemonade, you………………………… (get) sick. 30) If Marcus sings under the shower, I………………………(turn up) the radio up to full volume. 31) If I……………… ( go) to Leipzig, I'll visit the zoo. 32) If it…………………….(not rain), we'd be in the garden. 33) If you…………………… (wear) a lighter jacket, the car driver would have seen you earlier. 34) We……………………………….(watch) TV tonight if Peter hadn't bought the theatre tickets. 35) She wouldn't have had two laptops if she…………………………………… (sign) the contract. 36) If I were a millionaire, I………………………………(live) in Beverly Hills. 37) You would save energy if you………………………………( switch off) the lights more often. 38) If we had read the book, we………………………………… (understand) the film. 39) My sister could get 10 marks if the teacher…………….( explain) the grammar once more. 40) They…………………………………………….(arrive) on time if they hadn't missed the train. 41) If it rains, the boys………………………………(not play) hockey. 42) If he……………………… (grow) his own vegetables, he wouldn't have to buy them. 43) Jim………………………….(see) whisky destilleries if he travelled to Scotland. 44) Would you go out more often if you………………… (not have to do) so much in the house. 45) She wouldn't have yawned the whole day if she…………………….(not stay up) late last night. 46) If you…………….( wait) a minute, I'll come with you. 47) If we arrived at 10, we………………….(miss) Tyler's presentation. 48) We……………………………(help) John if we'd known about his problems. 49) If they…………………….(use) new batteries, their camera would have worked correctly. 50) If I went anywhere, it…………………………… (be) New Zealand. II. Use UNLESS instead of IF : 1. If she doesn’t hurry, she’ll be late. ……………………………………………………………… 2. If we had more rain, our crops would be better. ………………………………………………… 3. If you don’t like this one, I will bring you another. ……………………………………………… 4. If you are not careful, you will cut yourself with that knife. ………………………………………………………………………………… ……………………… 5. I’ll be able to do any work if I do now have a quiet room. ………………………………………………………………………………… ……………………… 6. The flood would have been ruined if the flood had risen higher. ………………………………………………………………………………… ……………………… 7. If you hadn’t sneezed, he wouldn’t have known that we were there. ………………………………………………………………………………… ……………………… 8. If she did her hair differently, she would look quite nice. ………………………………………………………………………………… ……………………… 9. If John had played for our football team, we would not have lost the game. ………………………………………………………………………………… ……………………… 10. If I won the first prize in a lottery, I’d give up my job. ………………………………………………………………………………… ……………………… III. Combine each pairs of these sentences, using IF : a) Type 1 : 1. Recycle and we’ll save natural resources. ……………………………………………………… 2. Be careful or you will fall over the rocks. ……………………………………………………… 3. Working too much can make you feel tired. ……………………………………………………… 4. Don’t be careless or you’ll break the vase. ………………………………………………………. 5. Ha can pass the exam, she has to work hard. ……………………………………………………… 6. He can do a part to save the environment by buying recycled products. ………………………………………………………………………………… ……………………… 7. Putting garbage into the bins is one answer to minimize pollution. ………………………………………………………………………………… ……………………… 8. We should take the map with us or we will lose our way on the street. ………………………………………………………………………………… ……………………… 9. Ellen can borrow it, but she must give it back next week. ………………………………………………………………………………… ……………………… 10.The authorities are thinking of raising the petrol prices. I will have to cycle to work. ………………………………………………………………………………… ……………………… b) Type 2 : 1. I can’t give you the answer because I don’t know. ………………………………………………. 2. Why don’t you apply for the job ? ……………………………………………………………… 3. I advise you to pay a visit to Nha Rong Harbor. ………………………………………………… 4. But for his pension, he would starve. ………………………………………………………… 5. How about going to school by bus ? …………………………………………………………… 6. Mrs. Green has no money so he won’t travel to the world. ………………………………………………………………………………… …………………… 7. Rachel might fall her driving test. But she can take it again. ………………………………………………………………………………… …………………… 8. The office might be closed. In that case Minh won’t be able to walk in. ………………………………………………………………………………… …………………… 9. You haven’t got a pen, so you can’t write down the address. ………………………………………………………………………………… …………………… 10.The number on those houses in this apartment aren’t clearly numbered, therefore I find it difficult to find my cousin’s house. ………………………………………………………………………………… ……………………… c) Type 3 : 1. Jerry didn’t understand the lesson. He didn’t answer. ………………………………………………………………………………… ……………………… 2. Carol didn’t answer the telephone because she was studying. ………………………………………………………………………………… ……………………… 3. Because he didn’t study hard enough, he failed in the exam. ………………………………………………………………………………… ……………………… 4. I was stuck in the traffic jam ; and that’s why I came late. ………………………………………………………………………………… ……………………… 5. He had the flu because he went out in the rain last night. ………………………………………………………………………………… ……………………… 6. John didn’t find the money. He didn’t return it. ………………………………………………………………………………… ……………………… 7. I didn’t know you were there. I didn’t call you. ………………………………………………………………………………… ……………………… 8. The heavy rain prevented everybody from going out. ………………………………………………………………………………… ……………………… 9. Jimmy lent me the money. Otherwise, I would have gone out with business. ………………………………………………………………………………… ……………………… 10.Without your help, I wouldn’t have succeeded this project. ………………………………………………………………………………… ……………………… d) Mixed practice : 1. Why don’t study hard ? ………………………………………………………………………… 2. Keep silent or you’ll wake the baby up. …………………………………………………………. 3. I don’t know the answer, so I can’t tell you. …………………………………………………… 4. We got lost because we didn’t have the map. ……………………………………………………. 5. My friend was so late, so he missed the train. …………………………………………………… 6. This car is too heavy for me to move. …………………………………………………………… 7. Morning exercises make me feel healthy. ………………………………………………………. 8. The church bells keep me from sleeping. ………………………………………………………… 9. Without air, we would die. ………………………………………………………………… 10. I advise him to stop smoking. ……………………………………………………………………. 11. Be calm, or you’ll make a wrong decision. ……………………………………………………… 12.Without a visa, he couldn’t have come to that new country. ………………………………………………………………………………… ……………………. 13.Today isn’t Sunday, so the students don’t go swimming. ………………………………………………………………………………… …………………… 14.Because you don’t leave immediately, I call the policeman. ………………………………………………………………………………… ……………………… 15.I don’t know her number, so I don’t ring her up. ………………………………………………………………………………… ……………………… 16.Go right now or you will be late for the train. ………………………………………………………………………………… ……………………… 17.As she is often absent from class, she can’t keep pace with her classmates. ………………………………………………………………………………… ……………………… 18.I couldn’t write to Alice because I didn’t know her address. ………………………………………………………………………………… ……………………… 19. The heavy rain kept everybody from going outdoors. ………………………………………………………………………………… ……………………… 20. I didn’t watch TV last night because I was busy. ………………………………………………………………………………… ……………………… 21.People don’t see the UFO, so they don’t call the National UFO Reporting Center. ………………………………………………………………………………… ……………………… 22.Thu can’t swim, so she doesn’t go swimming in Lam Son Swimming pool. ………………………………………………………………………………… ……………………… 23.His flight was delayed so he couldn’t be there on time. ………………………………………………………………………………… ……………………… 24. Thanks to Lisa’s report, I was able to finish the project. ………………………………………………………………………………… ……………………… 25.Without your help, I couldn’t overcome the problem. ………………………………………………………………………………… ……………………… 26. She didn’t stop her car because she didn’t see the signal. ………………………………………………………………………………… ……………………… 27. They do not understand you because you speak too fast. ………………………………………………………………………………… ……………………… 28.He doesn’t apply for the job because he doesn’t have enough qualifications. ………………………………………………………………………………… ……………………… 29. He never polishes his shoes, so he never looks smart. ………………………………………………………………………………… ……………………… 30. Go right now or you will be late for the train. ………………………………………………………………………………… ……………………… . Bài tập câu điều kiện I. Use the correct form of the verbs in parentheses : a) Type 1 : 1. If the weather