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1、条件状语从句讲解及练习一、考点归纳l 由连接词if或unless引导的状语从句叫做条件状语从句。（注意：在含有条件状语从句的复合句中，如果主句是一般将来时态，从句要用一般现在是“主将从现原则”。通常译作“假如，如果，除非”。引导词：l 常用引导词：if,unless1. if引导词用法学习 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。if引导的条件句有：真实条件句和非真实条件句两种:（1） 真实条件句：表示在某种条件下某事很可能发生。 Eg:a) Ify
2、ouaskhim,hewillhelpyou.如果你请他帮忙,他会帮你的。b) Ifyoufailintheexam,youwilllethimdown.如果你考试不及格,你会让他失望的。c) Ifitrainstomorrow,wewontgoonapicnic.如果明天下雨，我们就不去野餐。注意：切记紧跟着if的那句话是从句。（2） 非真实条件句是虚拟语气的一种，表示与事实相反，不可实现的条件或根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。Eg:a) IfIwereyou,Iwouldinvitehimtotheparty.如果我是你,我会邀请他参加聚会
3、。b) IwouldhavearrivedmuchearlierifIhadnotbeencaughtinthetraffic.如果没有堵车,我会到的早一点儿。c) IfIwereyou,Iwouldgowithhim.如果我是你,我会和他一起去的。2. unless引导词用法（1） 固定搭配：unless=if.not除非,若不,除非在的时候。Eg:a) Youwillfailtoarrivethereintimeunlessyoustartearlier.=Ifyoudontstartearlier, youwillfailtoarrivethereintime.如果你不早点动身,你就不能
4、及时赶到那儿。b) Unlessitrains,thegamewillbeplayed.=Ifitdosentrain，thegamewillbeplayed.除非下雨,比赛将照常进行。c) Letsgooutforawalkunlessyouaretootired.d) =Ifyouarenottootired,letsgooutforawalk经典语句：Ifitdosentraintomorrow,wewillgotothezoo.条件状语从句就是用以表示“在某种条件下,会”二、课堂练习I 用所给词的适当形式填空1.If you _(feel) tired, you _ (have) to
5、 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.T
6、he 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 _(go) to the beach if it_ ( not rain) this week.12. _they _( have) a matc
7、h 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 exams 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，
8、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 park _ 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
9、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. II.单项选择1.If you _ to the party, youll have a great time. A. will go B. went C. go D. going2. It will be a
10、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. to C. on D. with5I _ her the answer if she _me. A. can tell, will ask B. wil
11、l 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 tomorrow?-Sorry, I dont know. When he _ back, Ill tell you. A. comes B. will come
12、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 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 Olympic Games be held D. the nex
