初中英语——条件状语从句2

1、中学英语 条件状语从句一条件状语从句的概念条件状语从句，即在某种条件下，一件事情可能发生；在英语中由连接词if 或 unless等引导的状语从句叫做条件状语从句；条件是指某一件事情实现之后（状语从句中），一件事情（主句）才能发生，通常译作“假如，只要，假如”等意思；条件状语从句中，主从句的时态要遵循“主将从现”的原就；即，主句是将来时态时，从句用一般现在时代替将来时态；二.条件状语从句的引导词1. ifconj .假如，假如if you ask him ， he will help you 假如你请他帮忙，他会帮你的；if you fail in the exam ， you will let

2、 him down 假如你考试不及格，你会让他扫兴的；2. unless conj.除非 ,如不 ,除非在的时候（ if .not.）you will fail to arrive there in time unless you start earlier.假如你不早点动身, 你就不能准时赶到那儿；unless it rains, the game will be played.除非下雨, 竞赛将照常进行； 3.so/as long as conj.只要you may borrow my book as long as you keep it clean.只要你保持书的清洁，你就可以把我的书

3、借去；三关于条件句的时态，常见的有以下三种情形：1、条件状语从句的主句是一般将来时，那么从句经常用一般现在时； when i grow up, i ll be a nurse and look after patients.我长大后要当一名护士，照料病人；2、假如主句是祈使句，那么从句通常要用一般现在时； if you want to have a chat ,call me up.假如你想谈天，打我电话；3、假如主句是含有情态动词时，依据需要从句多用一般现在时；you should be quiet when you are in the reading room.在阅览室时应保持寂静；四学

4、问拓展1 在以 when ， before ， as soon as 等引导的时间状语从句，也适用“主将从现 ”原就，即假如主句是一般将来时，从句就用一般现在时；i'll tell her the good news when she comes back.当她回来的时候，我将把这个好消息告知她；she will give you a call as soon as she returns.她一回来就会给你电话；2.if 条件句的同义句：祈使句，and /or+ 将来时态的陈述句；work hard ,and you will make great progress.=if you w

5、ork hard,you will make great progress.假如你努力学习，你才会取得大的进步；hurry up, or you will be late.=if you dont hurry up.you will be late.假如你不快点，你就要迟到了；条件状语从句的时态练习一、用所给词的适当形式填空1. when i feel tired, i have t a rest.2. where he see the film if he have time.3. unless there be many trees, there be more pollution.4.

6、he dressmore casually unlesshe work on weekends.5. if marcia live alone, she keep a pet parrot.6. lana buy a new dress as soon as the old one be out of style.7. the twins fight when they argue.8. i have a bake sale if i need money for education.9. peter send me a beautiful souvenir as long as he tou

7、r spain.10. as long as 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 grandparentsas long ashe be free of task.14. unlessshe get up late, she catch the early bus.15. pe

8、ter major in english if he pass the exams in pekinguniversity.15.假如他到的晚了会发生什么事情？what if he late.16. 假如努力学习，你就会取得好成果；if you , you good .17. 他假如不看电视了，他的父母会很兴奋；unlesshe tv too much, his parents very happy.18. 假如我们为他组织生日聚会，大家都会来的；everyone if we a birthday party him.19. 除非明天下雨，否就我将和你一起去公园的；unless it tomo

9、rrow, i go to the park you.20. 假如她睡过头了，就会旅行迟到的；she; the trip if she .21. 只要他有空，他会帮忙你的；as long as he , he you.22. 假如 tom 考试不及格，他就没有机会上高中了；tom have the to go to the high school if he the exams.23. 你假如抄同学的作业就不能学好各门功课；you good at every subjects if you the other students homework.二、单项挑选（15 分）1. if you to

10、 the part y, you ll have a great time. a. will gob. wentc. god. going2. it will be a long time peter his work.a. since, has finishedb. after, finishesc. when, will finishd. before, finishes.3. what will fatherbring us, he comes from china.a. ifb.whenc. as long asd.untill4. if wangfang me, me at once

11、.a. need,tell b.needs,telling c.need,telling d.needs,tell 5 i her the answer if she me.a. can tell, will askb. will tell, will askc. would tell, askd. will tell, asks6. what are you going to do tomorrow.-we ll go to the library tomorrow if it .a. isn t raibn. rainc. won t raind. doesn t rain 7. do y

12、ou know when he will come back tomorrow.-sorry, i don t know. when he back, i ll tell you.a. comesb. will comec. comed. may come8. what will you do if you to the old folk s home visit.a. gob. wentc.goingd. will go9. i eat much food , i ll be very fat.a. althoughb. ifc. whiled. because10. i lnl ot gi

13、ve the book to him he will comehere next sunday.a. ifb. as long asc. thoughd. unless11. there an english film in our school tomorrow.a. is going to haveb. will havec. is going to bed. has12. could you tell us where？a. will the next olympic games heldb. the next olympic games will be heldc. would the next olympic games be heldd. the next olympic games would be held13. when my mother returned last night, i a boo