2022年初中英语If引导的条件状语从句.docx

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1、精选学习资料 - - - - - - - - - 精品资料 欢迎下载中学英语 if 引导的条件状语从句在 if 引导的条件状语从句中, if 和条件句位置敏捷, 可直接放在主句后面,如 if 条件句放句首,从句后面要加逗号,和主句隔开；仍要留意前后时态一致原就 .引导条件状语从句的连接词主要有：if 假如）、unless（除非）或 as long as（只要）等； unless在意思上等于 if.not；一、条件状语从句用法1、引导条件状语从句最常用的连词是 种条件下某事很可能发生；如：If you ask him, he will help you. 假如你请他帮忙 ,他会帮你的；if, 由

2、 if 引导的条件状语从句表示在某If you fail in the exam, you will let him down. 假如你 考试 不及格 ,你会让他扫兴的；另外 ,if 从句仍表示不行实现的条件或根本不行能存在的条件,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；如: If I were you, I would invite him to the party. 假如我是你 ,我会邀请他参与聚会；2、unless = if.not.除非 ,如不 ,除非在 的时候例如： Lets go out for a walk unless you are too tired.

3、 =If you are not too tired, lets go out for a walk. Unless it rains, the game will be played. 除非下雨 ,竞赛将照常进行；二、时态问题在条件状语从句中,要留意“主将从现 ”的规定,即主句用一般将来时,从句用一般现在时表示将来时；例句：I will come to see you if I have time. 我有时间,我就来看你；三 假如 if 条件句谈论的是重复发生和预示要发生的情形和大事,就主从 句大多用一般现在时态；如：If bears are in danger ,they attack p

4、eople. 误区提示if 既可以引导条件状语从句,表示“假如 ”,也可以引导宾语从句,表达“是 if 和否”；辨别它在这两种从句中的时态是我们常常简单出错的地方；另外,unless的用法也需留意；典型例题：-I wonder if your wife to the party. -If your wife _, so will mine ；. A. will go , go B. will go, goes C.goes, will go D. will go, will go 名师归纳总结 解析：第一句中 if 表示“是否”,引导宾语从句, 用将来时 will go ；其次句 “如第 1

5、页,共 6 页果你的妻子去,我的妻子也去”,if 引导条件状语从句,用一般现在时表示将来时； your wife,单三人称主语,所以用goes ；- - - - - - -精选学习资料 - - - - - - - - - 精品资料 欢迎下载总结IF 引导的一、表示将来可能发生的：1 If sb does sth, sb will do sth = sb will do sth if sb does sth 主句一般将来时 从句一般现在时2主句为祈使句或情态动词形式If sb does sth, please do sth If sb does sth, sb may情态动词 do sth 二、

6、表必定发生的If sb does sth, sb/sth does sth = sb/sth do sth if sb does sth 主句一般现在时,从句一般现在时（相当于 when 引导的从句）Unless引导的sb will do sth unless sb does sth if sb does not do sth 名师归纳总结 - - - - - - -第 2 页,共 6 页精选学习资料 - - - - - - - - - 精品资料 欢迎下载练习1.He _ fail in the exam if he _ not study hard. 2.Unless you _ leave

7、 now, you _be late. 3.We _ have a barbecue unless it _ rain . 4.Hurry up, or you will miss the bus.（同义句转换）_ you don t hurry up, you _ catch the early bus.5.Study hard, or youll miss fall behind.（同义句转换）_ you study hard, you_ fall behind. 6.If you dont put on your scarf, you（同义句转换）Put on your scarf, _

8、 youll catch cold.7.I dont know if it_ tomorrow. ）表是否 ,用将来时态 If it _ ,I wont go shopping. rain（表假如 ,用现在时态）8.I want to know if he _come tomorrow, if he _come, I _give the massage to him. 9. Please let us know if he _arrive tomorrow. 请告知我们他明天 是否会来Please let us know if he _ arrive tomorrow. 假如 他明天来的话请告

9、知我们10.I sure if he _go to the party, he_ have a great time. 11.If the rain _stop tonight, we will go to the cinema. 名师归纳总结 12.I ll buy a computer if I _have enough money.第 3 页,共 6 页- - - - - - -精选学习资料 - - - - - - - - - 精品资料 欢迎下载13.You _not get nervous if you _do enough exercise. 14.If she _ be kind

10、to me , I _not argue with her. 15.If you _pay more attention to that, he _ not get injured. 16.Mr Li will be mad if we _break the rules. 17. If it _ be cloudy, they _not go there by air. when the foreigner _come into the 18.Shall I say “ Hello ” classroom. 19.Hell get better grades if he _ study har

11、d.20. If you work really hard, you _ be famous and rich. 名师归纳总结 - - - - - - -第 4 页,共 6 页精选学习资料 - - - - - - - - - 精品资料 欢迎下载if 条件状语从句的时态练习一在正确的答案下划一条线；1.Daina will go/go/goes to Europe if she will pass/pass/passes the exams . 2. The graduates will teach/teach/teaches in the poor village if the Ministr

12、y of Education will agree/ agree/agrees soon. 3. If a UFO will land/land/lands in front of me, I will go/go/goes in to look for the alien. 4. If he will have/have/has money, he will bulid/build/builds a science lab. 5.Dont wait for me if I am/ will be late.6.They won t/don t go to the beach if it wi

13、ll rain/rain /rains.7. I will call/ call you if he will stay/stay /stays at home. 8. Will / Do/ Does he visit the museum if he wont / don tired. t/ doesnt get 9. Where will/ do/does they live if they will miss/ miss/ misses the bus. 二、用所给词的适当形式填空1.If you _feel tired, you _ have to have a rest. 3. If

14、 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. 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 _tou

15、r 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. 12. _they _ have a match if the P.E. teacher _be busy. 13.He _write a letter to his grandparents if he _get his report card this week. 14. If she _get up late, she _ not catch t

16、he early bus. 15. Peter _major in English if he _pass the exams in Peking University. .单项挑选（ 15 分）ll have a great time. A. will go B. went C. go D. 1.If you _ to the party, yougoing 2. It will be a long time _ Peter _ his work. A. since, has finished B. after, finishes C. when, will finish D. before

17、, finishes. 3. What will father _ us from Japan. A. take B. bring C. carry D. make 4. Weifang is famous _ kites. A. for B. to C. on D. with 5 I _ her the answer if she _me. 名师归纳总结 - - - - - - -第 5 页,共 6 页精选学习资料 - - - - - - - - - 精品资料 欢迎下载A. can tell, will ask B. will tell, will ask C. would tell, as

18、k D. will tell, asks 6. What are you going to do tomorrow. -Well go to the library tomorrow if it _. t rainA. isnt rainB. rain C. won t rainD. doesn 7.Do you know when he will come back tomorrow. -Sorry, I dont know. When he _ back, I tell you. ll s home visit.A. comes B. will come C. come D. may co

19、me 8. What will you do if you _ to the old folkA. go B. went 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 名师归纳总结 1-5 CDBAD 6-10 DAACB 11-15 第 6 页,共 6 页- - - - - - -