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1、-英语条件状语从句讲解和练习-第 5 页条件状语从句引导词：if(如果) ,unless(除非), in case(以防)时态：主将从现(可能会发生的事情) 主现从现(肯定会发生/祈使句)1. if引导的条件状语从句，可位于前面或后面，但是如果放在后面，主从句用逗号隔开。e.g.I will call you if I come. 或 If I come, I will come.(主将从现) 如果明天不下雨，我们将去野炊。_ If you drop the vase,it falls into pieces.(主现从现) 如果你摔花瓶的话，它就会变成碎片。如果你把水冷却的话，它就会变成冰。_
2、 If you have any problems,please call me.如果你知道答案，请举手。_2. unless引导的条件状语从句，位置和if引导的一样。 Unless=if.notE.g. If you dont study hard,you will not pass the exam. =Unless you study hard,you will not pass the exam.除非你努力工作，否则你不会得到高工资。（high salary）。_3. 条件状语从句和祈使句之间的转换。 结构：祈使句，and/or +从句 （and:那么 or否则） 1.)Work ha
3、rd,and you will get a high salary. =If you work hard, you will get a high salary. 2.)Work hard,or you will not get a high salary. =Unless you work hard, you will not get a high salary. =If you dont work hard, you will not get a high salary.练习一在正确的答案下划一条线。1.Daina ( will go/go/goes) to Europe if she (
4、will pass/pass/passes) the exams .2. The graduates (will teach/teach/teaches) in the poor village if the Ministry of Education (will agree/ agree/agrees) soon.3. If there (will be/ are/is) a car accident, they (will call/call/calls) 110 for help at once.4. If it (wont/dont/doesnt/ isnt) rainy, we (w
5、ill take/ take/takes) walk outside.5. If a UFO (will land/land/lands) in front of me, I (will go/go/goes) in to look for the alien.6. If he (will have/have/has) money, he (will bulid/build/builds) a science lab.7.Dont wait for me if I (am/ will be) late.8.They (wont/dont) go to the beach if it (will
6、 rain/rain /rains).9. I (will call/ call) you if he (will stay/stay /stays) at home.10. Mr Smith (will let/ let/lets) you know if he (will need/ need/ needs) help.11. (Will / Do/ Does) he visit the museum if he (wont / dont/ doesnt) get tired?12. Where (will/ do/does) they live if they (will miss/ m
7、iss/ 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.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
8、 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.11.I
9、_(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) the early bus.15. Peter _(major) in English if he _(pass) the exa
10、ms in Peking University.15.如果他到的晚了会发生什么事情？What _ if he _ late?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.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 pa
11、rk _ you.20. 如果她睡过头了，就会旅游迟到的。She;_ the trip if she _.21. 如果他有空，他会帮助你的。If he _, he _ you.22. 如果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 party
12、, youll have a great time. A. will go B. went C. go D. going2. 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 B.
13、to C. on D. with5 I _ her the answer if she _me. A. can tell, will ask B. will tell, will ask C. would tell, ask D. will tell, asks6. What are you going to do tomorrow?-Well go to the library tomorrow if it _. A. isnt rain B. rain C. wont rain D. doesnt rain7.Do you know when he will come back tomor
14、row?-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 C.going D. will go9. If I eat _ food, Ill be very fat.A. too many B. many too C. too much D. much too10. Ill give the book to him if
15、 he _ here next Sunday.A. will come B. comes C. is coming D. came11. There _an English film in our school tomorrow.A. is going to have B. will have C. is going to be D. has12. Could you tell us where _？A. will the next Olympic Games held B. the next Olympic Games will be heldC. would the next Olympi
16、c Games be held D. the next Olympic Games would be held13. When my mother returned last night, I _ a book. A. read B. am reading C. was reading D. am going to read14.What _ you _ when it began to rain?A. do, do B. were, doing C. are, doing D. did, do15. Ill wake you up when he _back.A. will B. is going to come C. comes D. come