条件状语从句讲解及练习一、考点归纳由连接词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：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)If you ask him, he will help you. 如果你请他帮忙,他会帮你的。
b)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。
c)If it rains tomorrow, we won’t go on a picnic. 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)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。
b)I would have arrived much earlier if I had not been caught in the traffic. 如果没有堵车,我会到的早一点儿。
c)If I were you, I would go with him. 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)You will fail to arrive there in time unless you start earlier.=If you don’t start earlier, you will fail to arrive there in time. 如果你不早点动身,你就不能及时赶到那儿。
b)Unless it rains, the game will be played.=If it dosen't rain，the game will be played. 除非下雨,比赛将照常进行。
c)Let's go out for a walk unless you are too tired.d)= If you are not too tired, let's go out for a walk经典语句：If it dosen't rain tomorrow,we will go to the zoo. 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 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.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 ____________(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 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，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 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, 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 father _____ us from Japan?A. takeB. bringC. carryD. make4. Weifang is famous ______ kites.A. forB. toC. onD. with5．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 rainB. rainC. won’t rainD. doesn’t rain7.—Do you 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. If I eat ____ food, I’ll be very fat.A. too manyB. many tooC. too muchD. much too10. I’ll give the book to him if he ___ here next Sunday.A. will comeB. comesC. is comingD. came11. 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 book.A. readB. am readingC. was readingD. am going to read14.What ____ you ____ when it began to rain?A. do, doB. were, doingC. are, doingD. did, do15. I’ll wake you up when he ____back.A. willB. is going to comeC. comesD. come1---5 CDBAD 6---10 DAACB 11---15 CBCBC“”“”At the end, Xiao Bian gives you a passage. Minand once said, "people who learn to learn are very happy people.". In every wonderful life, learning is an eternal theme. As a professional clerical and teaching position, I understand the importance of continuous learning, "life is diligent, nothing can be gained", only continuous learning can achieve better self. Only by constantly learning and mastering the latest relevant knowledge, can employees from all walks of life keep up with the pace of enterprise development and innovate to meet the needs of the market. This document is also edited by my studio professionals, there may be errors in the document, if there are errors, please correct, thank you!。