10 if引导的条件状语从句-2024-2025学年八年级英语上册单元语法精讲精练（通用版）

2024-2025学年八年级英语上册单元语法精讲精练（通用版） 10 if 引导的条件状语从句 语法聚焦 if引导的条件状语从句 1. if 意为“如果”时，用来引导条件状语从句，表示在某条件下，某事很可能发生。“if+从句”既可放在主句之前，也可放在主句之后。放在主句之前时，常用逗号与主句隔开。 2. 目前我们学习的if从句都是真实条件句，即从句提出的是有可能实现的情况，这时if从句的谓语动词用一般现在时，而主句则用一般将来时，即通常所说的“主将从现”。如： If it rains tomorrow, we won't go to the beach. 如果明天下雨，我们将不会去海滩。 3. if引导的条件状语从句还有以下几种句子结构： (1)当if从句表述的是一种真理或客观规律时，主句和从句都用一般现在时。如： Water becomes ice if the temperature is below zero. 如果温度低于0℃，水就会结冰。 (2)当主句是祈使句时，if从句用一般现在时。如： Please call me if he gets home. 如果他回到家，请打电话给我。 (3)当主句含有情态动词时，if从句用一般现在时。如： If it is a red light, you must stop and wait. 如果是红灯，你必须停下来等。 语法专练 一、单项选择题。 1. —What _______ if Jack doesn't get enough exercise? —He may be ill. A. happened B. will happen C. is happening D. happens 2. He will not miss the bus _______ he gets up early. A. since B. if C. unless D. so 3. If Kate _______ to my party tomorrow, I will be very happy. A. comes B. will come C. came D. is coming 4. —Where are you going this weekend? —If it _______, I'll go to the beach with my mother. A. isn't raining B. won't rain C. doesn't rain D. didn't rain 5.If you fail the test again, your mother _______ angry. A. are B. is C. will be D. was 6. My father will be late if he _______ now. A. leaves B. will leave C. didn't leave D. doesn't leave 7.If you want to lose weight, you must _______ less meat. A. eat B. will eat C. ate D. be eating 8.. If you heat the ice, it _______ into water. A. will turn B. turns C. is turning D. turned 9. —Do you know if Tom will go to the movies? —I think he _______ if he is free tomorrow. A. will go B. goes C. went D. go 10.. If Tom ________ the game, we’ll give him a surprise. A. win B. wins C. won D. miming 11. If there ________ no buying and selling of animals, there ________ no killing in nature. A. is; will be B. will be; will be C. is; is D. will be; is 12. I’m waiting for my friend. ________, I’ll go shopping alone. A. If she comes B. If she won’t come C. If she doesn’t come 13.The students ________ have a sports meeting this weekend if it ________。 A. won’t; rains B. will; rains C. won’t; will rain D. are going to; is going to rain 14. If you ________ to the party, you ’ll have a great time. A. will go B. went C. go D. going 15. — What are you going to do tomorrow? — We’ll go to the library tomorrow if it ________. A. isn ’t rain B. rain C. won ’t rain D. doesn ’t rain 16. What will you do if you ________ to the old folk ’s home visit? A. go B. went C. going D. will go 17. If I eat ________ food, I ’ll be very fat. A. too many B. many too C. too much D. much too 18. I’ll give the book to him if he ________ here next Sunday. A. will come B. comes C. is coming D. came 19. I ________ her the answer if she ________ me. A. can tell; will ask B. will tell; will ask C. would tell; ask D. will tell; asks 20. We’ll go to the farm and help the farmers with the apple picking if it ________ tomorrow. A. won ’t rain B. will be rainy C. doesn’t rain D. isn’t raining 21. There is going to ________ a sports meeting next week. If it ________, we’ll have to cancel it. A. be; will rain B. have; will rain C. be; rains 22. Your teacher will be unhappy if you ________ to school late. A. come B. will come C. are coming D. came 23. I don’t know if he ________. If he ________, please let me know. A. comes; comes B. will come; will come C. will come; comes D. comes; will come 24. You will stay healthy ________ you do more exercise, such as running and walking. A. if B. how C. before D. where 25. If she ________ here tomorrow, I will tell you. A. comes B. will come C. come D. came 26.Stop smoking,Joe! You ________yourself if you keep on doing it like that.  A.have killed　 B.will kill　 C.is killing　 D.killed 27.Why not look up the new words in a dictionary ________you don’t know it?  A.if　 B.that　 C.though　 D.whether 28.You will see many people dancing together on the square if it ________in the evening.  A.doesn’t rain　 B.rains　 C.will rain　 D.won’t rain 29.This math question is ________hard for me ________work out.  A.so; that　 B.such; that　 C.enough; to　 D.too; to 30.In summer,milk will quickly go bad ________you put it into a fridge.  A.though　 B.unless　 C.because　 D.once 二、用所给词的适当形式填空。 1. If you ________ (feel) tired, you ________ (have) to have a rest. 2. Where ________ he ________ (see) the film if he ________ (have) time? 3. If there ________ (be) fewer trees, there ________ ( be) more pollution. 4. He ________ (dress) more casually if he ________ (not work) on weekends. 5. If Marcia _______(live) alone, she _______( keep) a pet parrot. 6. Lana ________ buy) a new dress if the old one ________ (be) out of style. 7.The twins ________ (fight) if they ________ (argue). 8. I ________ (have) a bake sale if I ________ (need) money for education. 9. Peter ________ ( send) me a beautiful souvenir if he ________ (tour) Spain. 10. If Mr Green ________ (say) I am hard- working, my parents ________ ( feel) glad. 三．完成句子。 1. 如果他迟到了会发生什么事情？ What ________ ________ if he ________ late? 2. 如果努力学习，你就会取得好成绩。 If you ________ ________, you ________ ________ good ________. 3. 他如果看电视太久了，他的父母会不高兴。 If he ________ TV too much, his parents ________ ________ unhappy. 4. 如果我们为他组织生日聚会，大家都会来的。 Everyone ________ ________ if we ________ a birthday party ________ him. 5. 如果明天不下雨，我会和你一起去公园的。 If it ________ ________ tomorrow, I ________ go to the park ________ you. 6. 如果我走路去上学，我将会迟到。（根据汉语意思完成句子，词数不限） If I walk to school, ____________________________. 7. 如果他有空，他会帮助你的。 If he ________ ________, he ________ ________ you. 8.如果 Tom 不努力学习，他就没有机会上高中了。 Tom ________ have the ________ to go to the high school if he ________ ________ ________ 9.如果我迟到，老师将会很生气。（根据汉语意思完成句子，词数不限） ______________, the teacher _______________________. 10. 如果你上课睡觉，老师会生气。 If you ________ in class, your teacher ________ ________ ________. 四、小语篇特训(语法选择)。 When your parents are fighting,you don’t know what to do.You may feel sad or even angry when it happens.Remember,　1　 people love each other,they may fight.If people live together and spend a lot of time with each other,sometimes they 　2　 with each other and get angry. It’s common.Sometimes you and your brothers and sisters get into a fight.The same goes for parents.If you 　3　 really upset when your parents fight,you should talk to them about your feelings.Sometimes,parents don’t know that 　4　 fight makes you feel upset unless you tell them.Then they’ll probably try to 　5　 .At least they will tell you why they are fighting.  (　 　)1.A.if 　 B.though　 C.because　 (　 　)2.A.disagree　 B.disagreed　 C.will disagree (　 　)3.A.will get　 B.got 　 C.get (　 　)4.A.they 　 B.them 　 C.their　 (　 　)5.A.stop 　 B.stopping C.stopped 参考答案： 一、1-5 BBACC 6-10 DABAB 11-15 ACACD 16-20ACBDC 21-25CACAA 26-30BAADB 二、1.feel, will have 2.will he, has 3.are ,will be 4.will dress,doesn’t work 5. lives,will keep 6.will buy, is 7.will fight,argue 8.will have,need 9.will send,visits 10.says,will feel 三．1. will happen is 2. work hard will get grades 3.watches will be 4. will come have for 5.doesn’t rain will go with 6.I will be late 6. is free will help 8.doesn’t chance doesn’t work hard 9.If I am late will be angry 10.sleep will be angry 四、1-5BCCCA 原创精品资源学科网独家享有版权，侵权必究！1 学科网（北京）股份有限公司 $$