2022年if引导的条件状语从句精讲与专题练习 .pdf

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1、精品资料欢迎下载八年级英语： if 引导的条件状语从句引导条件状语从句最常用的连词是if，常见的 if 条件状语从句表示在某条件下， 某事很可能发生， 条件是可能存在的， 主句中某种情况发生的概率也是很高的。如：If you ask him，he will help you如果你请他帮忙，他会帮你的。If you fail in the exam，you will let him down 如果你考试不及格，你会让他失望的。If you have finished the homework， you can go home 如果你作业做完了就可以回家了。另外，if 从句还表示不可实现的条件或根

2、本不可能存在的条件，也就是一种虚拟的条件或假设。 从句多用一般过去时或过去完成时，表示对现在或过去的一种假设。如：If I were you，I would invite him to the party 如果我是你，我会邀请他参加聚会。I would have arrived much earlier if I had not been caught in the traffic要不是交通堵塞，我本会来得早一些。另外你还要注意 if 条件句的时态搭配1if 从句用一般现在时，主句用一般将来时If he runs hell get there in time. 如果他用跑的，他就会及时赶到那儿

3、。The cat will scratch you if you pull her tail. 如果你拉猫的尾巴， 它就会抓你。2if 从句用一般现在时， 主句用 may/might/can If the fog gets thicker the plane may/might be diverted. 如果雾在大一些，飞机可能就会改在别的机场降落。If it stops snowing we can go out. 如果雪停了，我们就可以出去。3if 从句用一般现在时， 主句用 must/should If you want to lose weight you must/should ea

4、t less bread. 如果你想减肥，你必须少吃面包。4if 从句用一般现在时， 主句用一般现在时If you heat ice it turns to water. ( 也可用 will turn) 如果把冰加热，它就会化成水。名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 1 页，共 9 页 - - - - - - - - - 精品资料欢迎下载5if 从句用现在进行时， 主句用一般将来时If you are looking for Peter youll f

5、ind him upstairs. 如果你是在找彼得，上楼就会找到他。6if 从句用现在完成时， 主句用一般将来时If you have finished dinner Ill ask the waiter for the bill. 如果你吃完了，我就叫服务生来算账注意 ：学习 if 引导的条件状语从句的用法,现在总结一下 : if 条件句不一般 ,几个要点记心间 ; 条件句,放在前 ,逗号要放句中间。条件句表可能，主句多用将来时；条件句表事实，主句常用现在时。在 if 引导的条件状语从句中，如果从句谈论的是一个有可能发生的事实及其产生的相关的结果， 主句用一般将来时态， 从句用一般现在时态

6、。如：We can walk there if we cant find a bus . If it rains tomorrow ,we will not go to the zoo. What will you do if you find a panda in danger. 如果 if 条件句谈论的是重复发生和预示要发生的情景和事件，则主从句大多用一般现在时态。如：If bears are in danger ,they attack people. 在 if 引导的条件状语从句中， if 和条件句位置灵活，可直接放在主句后面，若if 条件句放句首，从句后面要加逗号，和主句隔开。还要注

7、意前后时态一致原则一、用所给词的适当形式填空1.If you _(feel) tired, you _ (have) to have a rest. 3. If there _(be) fewer trees, there _( be) more pollution. 5. If Marcia _(live) alone, she _( keep) a pet parrot. 6. Lana _( buy) a new dress if the old one _(be) out of style. 9. Peter _( send) me a beautiful souvenir if he

8、 名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 2 页，共 9 页 - - - - - - - - - 精品资料欢迎下载_(tour) Spain. 10. If Mr Green _(say) I am hard- working, my parents _( feel) glad. 11.I _(go) to the beach if it_ ( not rain) this week. 13.He _(write) a letter to his grand

9、parents if he _(get) his report card this week. 14. If she _(get) up late, she _ ( not catch) the early bus. 15. Peter _(major) in English if he _(pass) the exams in Peking University. 16. 如果努力学习，你就会取得好成绩。If you_ _, you _ good _. 17. 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.

10、18. 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. 19. 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. 21. 如果他有空，他会帮助你的。If he _, he _ you. 23. 你如果抄同学的作业就不能学好各门功课。You _ _ good at all the subjects if you _ the other students homework. .单项选择（ 15 分）1.If you _ to the par

11、ty, youll have a great time. A. will goB. went C. go D. going 2. It will be a long time _ Peter _ his work. A. since, has finished B. after, finishes C. when, will finish D. before, finishes. 3. What will father _ us from Japan? A. take B. bring C. carry D. make 4. Weifang is famous _ kites. A. for

12、B. to C. on D. with 5 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 6. What are you going to do tomorrow? 名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 3 页，共 9 页 - - - - - - - - - 精品资料欢迎下载

13、-We ll go to the library tomorrow if it _. A. isnt rainB. rain C. wont rainD. doesn t rain7.Do you know when he will come back tomorrow? -Sorry, I dont know. When he _ back, Ill tell you. A. comes B. will come C. come D. may come 8. What will you do if you _ to the old folks home visit?A. go B. went

14、 C.going D. will go 9. If I eat _ food, Ill be very fat.A. too many B. many too C. too much D. much too 10. Ill give the book to him if he _ here next Sunday.A. will come B. comes C. is coming D. came 11. There _an English film in our school tomorrow. A. is going to have B. will have C. is going to

15、be D. has 12. Could you tell us where _ ？A. will the next Olympic Games held B. the next Olympic Games will be held C. would the next Olympic Games be held D. the next Olympic Games would be held 13. When my mother returned last night, I _ a book. A. read B. am reading C. was reading D. am going to

16、read 14.What _ you _ when it began to rain? A. do, do B. were, doing C. are, doing D. did, do 15. Ill wake you up when he _back. A. will B. is going to come C. comes D. come 1-5 CDBAD 6-10 DAACB 11-15 CBCBC If 条件状从句例题【2011 陕西】 24. If there no buying and selling of animals, there no killing in nature

17、. A. is; will he B. will be; will be C. is; is D. will be; is 答案：A 【解析】考查点：本题考查if 引导的状语从句的时态。 if 意为“ 如果” 。引导条件状语从句，主将从现。故选A。【2011黑龙江绥化市】 25. Fm waiting for my friend._, Ill go shopping alone. A. If she comes B. If she wont come C. If she doesnt come 答案： C【解析】考查从句的时态。If 引导的条件状语从句，主句用将来时，从句用一般现在时。根据句意

18、：如果他不来，我就独自去购物。故选 C。【2011雅安】 10.The students _ have a sports meeting this weekend if it _。A. wont; rains B. will; rains C. wont; will rain D. are going to; is going to rain答案：A【解析】考查 if 引导的条件状语从句名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 4 页，共 9 页 - - -

19、- - - - - - 精品资料欢迎下载用法。if 意为“ 如果” ，引导条件状语从句，主句用一般将来时，从句用一般现在时态。 句意为 “ 如果明天下雨我们就不举行运动会了” 。故选 A。If 从句如何考？请看这道 2006 年河北省的中考题：Mike wants to know if_a picnic tomorrow. Yes. But if it_, well visit the museum instead. A. you have; will rain B. you will have; will rain C. you will have; rains D. will you ha

20、ve; rains 正确答案应该是 C。为什么同样一个if，后面所接的时态却不相同呢？这要从 if 引导的条件状语从句说起。条件状语从句表示主句动作发生的条件，在初中阶段常由if(如果)引导，表示假如有从句的动作发生就会有主句的动作发生。例如：Please call me if he is at home. 假如他在家的话，请给我打电话。条件状语从句和主句还有一个共同的伙伴，有时它可以替代从句和主句，它就是 “ 祈使句 +and / or+ 简单句” 。其中 and 表示句意顺承；or 则表示转折，意为 “ 否则” 。例如：If you work harder, youll pass the

21、exam. = Work harder, and youll pass the exam. 如果你再努力些，你就会通过考试。If you dont hurry up, youll miss the train. = Hurry up, or youll miss the train. 如果你不快点儿，你就赶不上火车了。在学习条件状语从句时，同学们要注意以下几点：一、时态呼应一般来讲， 复合句都要遵循主、 从句时态呼应规律， 状语从句也不例外。即主句用现在时，从句也用现在时；主句用过去时，从句也用过去的某种时态。具体地讲，主句是一般现在时(包括祈使句和含有情态动词 can, may, must

22、等)，从句也用一般现在时。例如：Have a good rest if you are tired. 如果你累了，就好好休息一会儿吧。You must see the doctor if you are ill. 如果你生病了，就必须去看医生。这里提醒大家特别要注意： 如果主句是一般将来时态， 这时从句不可以用将来时态，而要用一般现在时。例如：I won t go there with you if it rains tomorrow. 如果明天下雨的名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - -

23、 - - - - - - - 第 5 页，共 9 页 - - - - - - - - - 精品资料欢迎下载话，我就不和你一起去那儿了。If we do nothing, there will be only standing room on the earth. 假如我们不采取任何措施，地球上将只有站的地方了。二、主从句的位置大多数情况下， 从句可以位于主句之前， 也可以位于主句之后。不过从句在前时，主从句之间必须用逗号隔开。例如：Please tell me if he comes back. = If he comes back, please tell me. 如果他回来了， 请告诉我一

24、声。三、if 的两面性if 引导条件状语从句时意为“ 如果” ，如果引导宾语从句则意为“ 是否” 。请比较：1) We will go out if it is fine tomorrow. 2) I dont know if the train has arrived. 句 1) 中 if 引导的是状语从句。这个从句表示“条件”，修饰主句。整个句子的意思是“如果明天天气好，我们就出去”。句 2) 中if 引导的是宾语从句，充当谓语动词dont know 的宾语，整个句子的意思是“我不知道火车是否到了” 。通过以上讲解，同学们应该知道本文开头那道中考题的答案为什么选 C 了吧？再做几道题巩固一

25、下吧！实战演练 句型转换（同义转换）1. A. You must be quick. If not, youll miss the early bus. B. _quick, _you ll miss the early bus. 2. A: Put on your coat, or you ll catch a cold. B: _you _put on your coat, you ll catch a cold. 3. A. If you dont help me, I cant finish my work on time. B ._help, I cant finish my wor

26、k on time. 4. A. If you play basketball here, you may break the windows. B. _play basketball here ，_you may break the windows. 条件状语从句中考题【2011陕西】 24. If there no buying and selling of animals, there no killing in nature. A. is; will he B. will be; will be C. is; is D. will be; is 答案：【解析】考查点：本题考查 if引导

27、的状语从句的时态。 if 意为“如果”。引导条件状语从句，主将从现。故选A。【2011黑龙江绥化市】 25. Im waiting for my friend._, Ill go shopping alone. 名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 6 页，共 9 页 - - - - - - - - - 精品资料欢迎下载A. If she comes B. If she wont come C. If she doesnt come 答案：【解析】考查从句

28、的时态。 If 引导的条件状语从句，主句用将来时，从句用一般现在时。根据句意：如果他不来，我就独自去购物。故选C。【2011雅安】 10.The students _ have a sports meeting this weekend if it _. A. wont; rains B. will; rains C. wont; will rainD. are going to; is going to rain 答案：【解析】考查 if引导的条件状语从句用法。if意为“如果”，引导条件状语从句，主句用一般将来时，从句用一般现在时态。 句意为“如果明天下雨我们就不举行运动会了”。故选A。【2

29、011湖南湘西】 23. Don t talk loudly at the meetin g. If you _, you will have to leave. A. do B. are C. did 答案：【解析】考查状语从句的时态当主句为将来时态是，if引导的状语从句中用一般时态代替将来时，而这里需要助动词， 不是系动词， 所以选择答案 A。【2011湖南益阳】 29. I dont know if she to my birthday party tomorrow. If she , Ill be very happy. A. comes; comes B. will come; co

30、mes C. comes; will come 答案：【解析】宾语从句和条件状语从句的考查。由if引导的条件状语从句，用一般现在时态，主句用一般将来时。当if做是否讲时，所引导的宾语从句通常是一般将来时。【2011黑龙江齐齐哈尔】 35. I m waiting for my friend. , I ll go shopping alone.A. If she comes B. If she doesnt come C. If she won t come答案：【2011重庆江津】36.If she here tomorrow, I will tell you. A. comes B. wil

31、l come C. come D. came 答案：【2011山东滨州】 30. Mary, could you tell me if your mother _ our school sports meeting tomorrow? I think she will come to school if she _ free. 名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 7 页，共 9 页 - - - - - - - - - 精品资料欢迎下载A. will ta

32、ke part in; will be B. takes part in; is C. will take part in; is D. takes part in; will be 答案：【解析】考查 if引导的宾语从句及条件状语从句的用法。问句是由if引导的宾语从句，时间状语为 tomorrow ，故用一般将来时；答语是由 if引导的条件状语从句，主句用将来时，从句用一般现在时，故选 C。【2011山东泰安】 36. Tom wants to know if you will have a picnic tomorrow. Yes. But if it _, well play chess

33、 instead.A. will rain B. rained C. is raining D. rains 答案：【解析】连词的用法。 If 引导的条件状语从句，主句用将来时，从句用一般现在时。故选D。【2011山东潍坊】 6. If Tom _ the game, well give him a surprise. A. win B. wins C. won D. miming 答案：【解析】 考查 if引导的条件状语从句。在 if引导的条件状语从句中，如果主句和从句发生的动作都在将来时间，从句用一般现在时表将来。故选 B。【2011浙江宁波】 31. I hear the famous

34、singer Xu Song may come to Ningbo next month. Really? _ he comes, my younger sister will be very excited. A. If B. Until C. Unless D. Before 答案：【解析】状语从句考查。 if如果；until到为止； unless 除非；before 在之前。根据句意，如果他来，我的妹妹将会很激动的。【2011广东】 43. Lets go fishing if it _ this weekend.But nobody knows if it _. A. is fine,

35、 will rain B. will be fine, rains C. will be fine, will rain D. is fine; rains 名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 8 页，共 9 页 - - - - - - - - - 精品资料欢迎下载答案：【解析】本题考查 if的用法。第 1 空 if引导的是条件状语从句， 因此用一般现在时表示将来；第2 空 if引导的是宾语从句，时态时间状语 this weekend决定用将来时。故选A。名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 9 页，共 9 页 - - - - - - - - -