if引导的条件状语从句与专题练习(可编辑修改word版)
if引导的条件状语从句精讲与专题练习
if引导的条件状语从句精讲与专题练习初中英语――if引导的条件状语从句引导条件状语从句最常用的连词是if，常见的if条件状语从句表示在某条件下，某事很可能发生，条件是可能存在的，主句中某种情况发生的概率也是很高的。
如：If you ask him，he will help you．如果你请他帮忙，他会帮你的。
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。
If you have finished the homework，you can go home．如果你作业做完了就可以回家了。
另外，if 从句还表示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，表示对现在或过去的一种假设。
如：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。
I would have arrived much earlier if I had not been caught in the traffic．要不是交通堵塞，我本会来得早一些。
另外你还要注意if条件句的时态搭配1．if从句用普通目前时，主句用普通将来时If he runshe’ll get there in time.如果他用跑的，他就会及时赶到那儿。
The cat will scratch you if you pull her tail.如果你拉猫的尾巴，它就会抓你。
2．．if从句用一般现在时，主句用may/might/canIf the fog gets thicker the plane may/might be diverted.假如雾在大一些，飞机可能就会改在此外机场下降。
If it stops snowing we can go out.如果雪停了，我们就可以出去。
if条件状语从句练习题及答案
if条件状语从句练习题及答案If条件状语从句练习题及答案条件状语从句是英语中常用的一种从句结构，用来表示某个条件成立时，另一个事件或结果也将发生。
掌握条件状语从句的用法对于提高英语口语和写作能力非常重要。
下面将给出一些条件状语从句的练习题及答案，帮助读者更好地理解和掌握这一语法知识。
练习题一：1. If it rains tomorrow, ___________.2. She will be late for work if ___________.3. If I see him, ___________.4. If you don't study hard, ___________.5. If I were you, ___________.练习题二：1. If you ___________ to the party, please bring a gift.2. If I ___________ you, I would apologize.3. If she ___________ the exam, she will be very happy.4. If it ___________ tomorrow, we will go hiking.5. If he ___________ the bus, he will be late for the meeting.答案一：1. we will stay at home.2. she misses the bus.3. I will say hello.4. you will fail the test.5. I would study harder.答案二：1. come2. were3. passes4. doesn't rain5. misses通过以上练习题，我们可以发现条件状语从句的用法和特点。
首先，在条件状语从句中，通常使用的连词有if、unless、provided that等。
最新 状语从句期末复习专题练习(word版 ...
最新状语从句期末复习专题练习（word版 ...一、初中英语状语从句1．If our government pay attention to the safety of food, our health in danger. A．isn’t; is B．doesn’t; will beC．won’t; is D．isn’t; will be【答案】B【解析】【详解】句意：如果我们的政府现在不注意食品安全，我们的健康就会出于危险之中。
结合语境可知，本句主语描述的是将来某时进行的动作，故用一般将来时态。
当主句描述将来时态，if引导的条件状语从句中用一般现在时态表示将来动作，结合语境可知选B。
2．Tony has had to cook by himself ________ his mother went on business to Guangzhou. A．since B．after C．during D．when【答案】A【解析】【详解】句意：自从妈妈去广州出差以来，托尼不得不自己做饭。
A. since从……以来；B. after在……之后；C. during 在……期间；D. when当……时候。
since后跟时间状语从句时，表示的是到目前为止的时间段，从句时态为一般过去时，而主句的时态为现在完成时，故正确答案为A。
3．Our eyesight will become poorer and poorer we keep playing with phones.A．though B．unless C．if【答案】C【解析】【详解】句意：如果我们继续玩手机，我们的视力会越来越差。
A. though尽管，虽然；B. unless除非；C. if如果。
这里是if引导的条件状语从句，遵循主句用一般将来时，从句用一般现在时态，根据题意，故选C。
4．—Do you often watch the show If You Are The One?—Yes. It is _____ a successful programme that it catches _____ many audiences’ attention. A．such； such B．such； soC．so； such D．so； so【答案】B【解析】试题分析：句意：你经常看《非诚勿扰》这个节目吗？——是的，这是一个非常成功的节目，吸引了众多观众的注意。
if条件状语从句练习题及答案
if条件状语从句练习题及答案If条件状语从句练习题及答案If条件状语从句是英语中常见的一种句型，用来表达假设、条件或可能性。
下面是一些if条件状语从句的练习题及答案，希望对大家的学习有所帮助。
练习题：1. If it rains tomorrow, what will you do?A. I will go for a walk.B. I will stay at home.C. I will go to the beach.2. If I had more time, I _____ visit my grandparents.A. willB. wouldC. can3. If she _____ harder, she would pass the exam.A. will studyB. studiedC. studies4. If he _____ the train, he would have been late for work.A. missedB. missesC. will miss5. If you _____ me, what would you do?A. amB. wereC. will be答案：1. B. I will stay at home.2. B. would3. B. studied4. A. missed5. B. were以上是关于if条件状语从句的练习题及答案，希望大家能够通过练习加深对这一句型的理解，提高自己的英语水平。
同时也希望大家能够在日常生活中多加练习，提高自己的语言表达能力。
(完整版)if引导的条件状语从句练习题
If条件句专练I单项选择1. If he hard, he will get good grades。
A. study B。
studiesC。
will study D. studied2。
I want to know if Mary to the party tomorrow。
A。
go B. wentC。
will go D. goes3. Everyone must dress up。
If you ， they won't let you in。
A。
don’t B。
won'tC。
can’t D。
mustn’t4. Mary will go to Sanya if she a five-day trip。
A. haveB. hadC. will have D。
has5. If he comes late，he will miss the train.A. andB. soC。
/ D。
orII用所给词的适当形式完成句子1。
If Bruce ________（be) free, Let’s go to the park。
2。
Tell him the news if you ________ ( meet ) him tomorrow.3. If he ________(do) well in the exam。
His teacher will be pleased withhim.4．If Mary ______（leave ) home too long, she ________(miss） her parents.5. Be quick ,and you _________(arrive） in time。
6. Hurry up， or you_________(be ） late for school。
III完成句子1.如果他到的晚了会发生什么事情?What _______________ if he _____________ late？2.如果努力学习，你就会取得好成绩。
If条件状语从句练习题
If 条件状语从句练习题1. If he hard, he will get good grades. A. study B. studies C. will study D. studied2. Everyone must dress up. If you ,they won’t let you in. A. don’tB. won’tC. can’tD. mustn’t3. Mary will go to Sanya if she a five-day trip.A. haveB. hadC. will haveD. has4. If he comes late, he will miss the train. A. and B. so C. / D. or5. If you _____ to the party, you’ll have a great time. A. will goB. wentC. goD. going6.I ____ her the answer if she ____me. A. can tell, will ask B. will tell, will askC. would tell, askD. will tell, asks7. – What are you going to do tomorrow?--We’ll go to the library tomorrow if it ___. A. isn’t rain B.rain C. won’t rain D. doesn’t rain8. What will you do if you _____ to the old folk’s home visit? A.go B. went C. going D. will go9. I’ll give the book to him if he ___ here next Sunday. A. will come B. comes C. is coming D. came10. I’ll wake you up when he ____back.A. willB. is going to comeC. comesD. come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 will dress___ (dress) more casually,偶然, if he ____ ____ (not1work) 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. 三、翻译下列句子1.如果你打碎玻璃～你将不得不赔偿.2.如果你不快点的话～我们将误了火车。
初中英语If引导的条件状语从句(可编辑修改word版)
初中英语――if 引导的条件状语从句在if 引导的条件状语从句中，if 和条件句位置灵活，可直接放在主句后面，若if 条件句放句首，从句后面要加逗号，和主句隔开。
还要注意前后时态一致原则.引导条件状语从句的连接词主要有：if(如果）、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if,由if 引导的条件状语从句表示在某种条件下某事很可能发生。
如：If you ask him, he will help you.如果你请他帮忙,他会帮你的。
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。
另外,if 从句还表示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。
如: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。
2、unless = if...not. 除非,若不,除非在……的时候例如：Let's go out for a walk unless you are too tired.=If you are not too tired, let's go out for a walk.Unless it rains, the game will be played.除非下雨,比赛将照常进行。
二、时态问题在条件状语从句中，要注意“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。
三如果if 条件句谈论的是重复发生和预示要发生的情景和事件，则主从句大多用一般现在时态。
if条件状语从句练习及答案
if_条件状语从句的时态练习及答案_初中习题集之欧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 ______ kitesa. 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 tobe d. 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. comeII、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.Thetwins _____ (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.III. 完成句子1.如果他到的晚了会发生什么事情？What _______________ if he _____________ late?2. 如果努力学习，你就会取得好成绩。
(完整word版)if引导的条件状语从句讲解和练习(答案)
条件状语从句一、条件状语从句通常由if（如果)， unless（除非），as long as（只要)引导。
例如：If it rains tomorrow， we won't go to the park. 如果明天下雨,我们就不去公园了。
Unless weather stops me， I go for a walk every. 我每天都会去散步，除非遇上坏天气。
Our parents will be pleased with our performance as long as we try our best。
小试牛刀：1、只要我们竭尽全力，父母就会满意我们的表现.Our parents will be pleased with our performance _____ _____ ______ we try our best。
2、如果人人为保护环境做出贡献，世界将会变得更美好。
______ ______ ______ _____ _______ to protecting the environment， the world will become much more beautiful.二、if引导的条件状语从句（1)“if从句+祈使句”的句子。
其实,if作为一个连词,主句也可以是其他形式的句子。
例如：If you want to go, please let me know。
If the green light isn’t on, wait for a minute。
(2）“祈使句 + and （or）+ 陈述句” 在意思上相当于一个带有条件状语从句的复合句。
注意：A. “祈使句 + and + 陈述句”可以转化为if引导的肯定条件状语从句,而且主语是第二人称.B. “祈使句 + or + 陈述句”可以转化为if引导的否定条件状语从句，而且主语是第二人称。
例如：Study hard and you will pass the exam。
if引导的条件状语从句(作业及答案)
if 引导的条件状语从句（作业）一、单项选择( )1. If you to the party, y ou’ll have a great time.A. will goB. wentC. goD. going( )2. I her the answer if she me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell, asks( )3. —What are you going to do tomorrow?—We’ll g o to the library tomorrow if it .rain B. rainA. isn’ｔrainrain D. doesn’ｔC. won’ｔ( )4. —Do you know when he will come back tomorrow?—Sorry, I don’t know. When he back, I’ll tellyou.A. comesB. will comeC. comeD. may comehome visit? ( )5. What will you do if you to the old folk’sA. goB. wentC. goingD. will go( )6. I you up when he back.A. will wake; comeB. will wake; comesC. wake; comesD. wake; will come二、用所给词的适当形式填空7.If there(be) fewer trees, there ( be) more pollution.8.If Marcia (live) alone, she( keep) a pet dog.na (buy) a new dress if the old o ne(be) out of style.10.If Mr. Green (say) I am hard- working, myparents _ ( feel) glad.(go) to the beach if it11.I( not rain) this week.12.He (write) a letter to his grandparents if he(get) his report card this week.13.If she _ (get) up late, she( not catch) the early bus.三、根据汉语意思完成句子14.如果努力学习，你就会取得好成绩。
If-引导的条件状语从句专练
If 引导的条件状语从句专练学号: ________ 班级：_________ 姓名：___________ 一．单项选择1.Your teacher will be unhappy if you ____ to school late.A. comeB. will comeC. are comingD. came2. I don’t know if he _______. If he _____, please let me know.A. come; comesB. will come; will comeC. will come; comesD. comes; will come3. If he _____harder, he will catch up with me soon.A. studyB. studiesC. studyingD. to study4. Don’t go to Beijing if it ______ tomorrow.A. will rainB. won’t rainC. rainsD. doesn’t rain5. If I finish _______ my homework, I ______TV.A. do, watchB. to do, will watchC. to do, watchD. doing, will watch6. If he _____his father, his father _____A. tells, is angryB. tells, will be angryC. tell, is angryD. will tell, is angry7. —I wonder if it is going to rain next week.—If it _______, I have to stay at home.A. isB. doesC. doD. will8. Remember to call me ___ you have any trouble.A. beforeB. ifC. untilD. where9. You must stop _____ the policeman says “stop”.A. thatB. ifC. thenD. until10. Linda’s mother ____if she ____her work this week.A. comes back, finishesB. comes back, will finishC. will come back, finishesD. will come back, will finish11. Frank ____ to see his teacher if he ______ free tomorrow.A. will come, will beB. comes, isC. will come, isD. comes, will be12. Write down the phone number, ____ you’ll forget it.A. soB. andC. butD. or13. Stop smoking, ______you’ll get better soon.A. andB. orC. butD. after14. I’m waiting for my friend. ______, I will go shopping alone.A. If she comesB. If she doesn’t comeC. If she won’t comeD. If she will come15. You’ll be late ____ you don’t get up now.A. ifB. beforeC. untilD. after16. —Tony, do you know if Frank ______ to the theatre with us this Sunday if it _____?—Sorry, I have no idea.A. will go, is fineB. goes, is fineC. will go, is going to be fineD. goes, will be fine17. I don’t know if my parents ____us. If they ____us, we’ll go climbing.A. will agree with; agree withB. agree to; agreeC. agree with; agree withD. agree to; agree to18. Hurry up, ______ you’ll be late for school.A. andB. orC. soD. but19. ________cross the road if the traffic lights are red.A. Won’tB. Don’tC. Can’tD. Doesn’t20. You’ll be late again ____you hurry.A. ifB. whetherC. unlessD. as long as21. If it ______ tomorrow, we _____ build a snowman.A. snows, willB. snow, won’tC. will snow, willD. won’t snow, will22. In Britain, you must be 18 ______ you want to drive a car.A. whyB. becauseC. soD. if二．句型转换1.If you get up late, you will miss the school bus. (同义句)If you _______ get up early, you won’t ______the school bus.2.If you can work hard, you will pass the exam.If you __________ work hard, you ________fail the exam.3.If I have time this weekend, I will go to the park.___________ ________ you _______ if you have time this weekend?4.Put on your coat, or you’ll catch a cold.If you _______ put on your coat, you ______ catch a cold.5.We can’t live without any water.We can’t live ______ we ____________have any water.6.Think hard and then you’ll find a better way._________ ________ think hard, you’ll find a better way.7.If you aren’t careful, you will fall and hurt yourself._______ _________, __________ you will fall and hurt yourself.8.If you work hard, you will be successful.Work hard ________ you __________successful.三．改错1.If you know the answer, not ask others. （）________A B C2.Eat breakfast, and you will be hungry. ( ) _________A B C3.Turning on the TV if you want to watch the news. ( ) _________A B C4.If your mother meet him, please let me know. ( ) ________A B C四．适当形式填空1.If the camera __________(not start), ______________(press) the blue button.2.If Tom _____________(come) here, I ________________(not join) in the party.3.If the weather _________________(not be) fine, Miss Li _________(not do ) theshopping.4.If it _________(be) sunny tomorrow, I __________(go) to school on foot.5.If she _____________(arrive) this afternoon, she __________(call) you.。
if条件状语从句练习及答案
if_条件状语从句的时态练习及答案_初中习题集I.单项选择1.I f 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 ______ kitesa. 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. comeII、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. III. 完成句子1.如果他到的晚了会发生什么事情？What _______________ if he _____________ late?2. 如果努力学习，你就会取得好成绩。
if引导的条件状语从句练习题
if引导的条件状语从句引导条件状语从句最常用的连词是if，常见的if条件状语从句表示在某条件下，某事很可能发生，条件是可能存在的，主句中某种情况发生的概率也是很高的。
如：If you ask him，he will help you．如果你请他帮忙，他会帮你的。
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。
If you have finished the homework，you can go home．如果你作业做完了就可以回家了。
另外你还要注意if 条件句的时态搭配1．if从句用一般现在时，主句用一般将来时If he runs he’ll get there in time. 如果他用跑的，他就会及时赶到那儿。
The cat will scratch you if you pull her tail. 如果你拉猫的尾巴，它就会抓你。
2．if从句用一般现在时，主句用may/might/canIf the fog gets thicker the plane may/might be diverted. 如果雾在大一些，飞机可能就会改在别的机场降落。
If it stops snowing we can go out. 如果雪停了，我们就可以出去。
3．if从句用一般现在时，主句用must/shouldIf you want to lose weight you must/should eat less bread. 如果你想减肥，你必须少吃面包。
4．if从句用现在进行时，主句用一般将来时If you are looking for Peter you’ll find him upstair s. 如果你是在找彼得，上楼就会找到他5．if从句用现在完成时，主句用一般将来时If you have finished dinner I’ll ask the waiter for the bill. 如果你吃完了，我就叫服务生来算账If条件状从句练习（）1.If you _____ to the party, you’ll have a great timeA. will goB. wentC. goD. going（）2.–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 rain（）3. What will you do if you _____ to the old folk’s home visit? A. go B. went C. going D. will go（）4. If I eat ____ food, I’ll be very fat. A. too many B. many too C. too much D. much too（）5. I’ll give the book to him if he ___ here next Sunday.A. will comeB. comesC. is comingD. came（）6. I ____ her the answer if she ____me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell, asks7. We’ll go to the farm and help the farmers with the apple-picking if it ____ tomorrow.A. won’t rainB. will be rainyC. doesn’t rainD. isn’t raining8. There is going to _______ a sport s meeting next week. If it ________, we’ll have to cancel it.A. be, will rainB. have, will rainC. be, rains9. Your teacher will be unhappy if you _______ to school late.A. comeB. will comeC. are comingD. came10．I don’t know if he __. If he __ , please let me know.A. comes, comesB. will come, will comeC. will come, comesD. comes, will come二、用所给词的适当形式填空。
(完整word版)初中英语If引导的条件状语从句.docx
初中英―― if 引的条件状从句在 if 引的条件状从句中， if 和条件句位置灵活，可直接放在主句后面，若 if 条件句放句首，从句后面要加逗号，和主句隔开。
要注意前后一致原 .引条件状从句的接主要有： if( 如果）、unless（除非）或 as long as（只要）等。
unless在意思上等于 if...not。
一、条件状从句用法1、引条件状从句最常用的是if, 由 if 引的条件状从句表示在某种条件下某事很可能生。
如：If you ask him, he will help you.如果你他帮忙 ,他会帮你的。
If you fail in the exam, you will let him down.如果你考不及格 ,你会他失望的。
另外 ,if 从句表示不可的条件或根本不可能存在的条件 ,也就是一种虚的条件或假 ,从句多用一般去或去完成。
如 :If I were you, I would invite him to the party.如果我是你 ,我会邀他参加聚会。
2、 unless = if...not. 除非 ,若不 ,除非在⋯⋯的候例如：Let's go out for a walk unless you are too tired.=If you are not too tired, let's go out for a walk.Unless it rains, the game will be played.除非下雨 ,比将照常行。
二、在条件状从句中，要注意“主将从”的定，即主句用一般将来，从句用一般在表示将来。
例句：I will come to see you if I have time.我有，我就来看你。
三如果 if 条件句的是重复生和示要生的情景和事件，主从句大多用一般在。
如：If bears are in danger ,they attack people.区提醒if 既可以引条件状从句，表示“如果”，也可以引从句，表达“是否”。
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if 引导的条件状语从句
引导条件状语从句最常用的连词是if ，常见的 if 条件状语从句表示在
某条件下某事很可能发生。
如：
If you ask me ,I will answer you．
If it rains tomorrow, I will stay at home.
I will stay at home if it rains tomorrow.
另外， if 从句还表示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，表示对现在或过去的一种假设。
如：
If I were in university ，I would ⋯．
If I had enough money ,I would buy a car.
1.i f 从句用一般现在时，主句用一般将来时
If he runs , he’ll get there in time．
2.i f 从句用一般现在时，主句用 may/might/can/must If the fog gets
thicker the plane may/might be diverted.
3.i f 从句用一般现在时，主句用一般现在时
If you heat ice it turns to water. (也可用 will turn)
4.if 从句用现在进行时，主句用一般将来时
If you are looking for Peter you ’ ll find him upstairs.
5.if 从句用现在完成时，主句用一般将来时
If you have finished dinner I ’ ll ask the waiter for the bill.
一、用所给词的适当形式填空
1.If you (feel) tired, you (have) to have a
rest.
3. If there (be) fewer trees, there ( be) more pollution.
5.If Marcia (live) alone, she
( keep) a pet parrot.
na ( buy) a new dress if the old one
(be) out of style.
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.
13.H e (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.
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.
21. 如果他有空，他会帮助你的。
If he , he you.
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.
Ⅰ.单项选择
1.I f you to the party, you ’ llhave a great time. A. will go B. went C. go D. going
2.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. carry D. make
4.Weifang is famous kites. A. for B. to
take
C. on
B. bring D.
C.
with
5.I her the answer if she me.
A. can tell, will ask
B. will tell, will ask
C. would tell, ask
D. will tell, asks
6.–What are you going to do tomorrow? --We’ll go
to the library tomorrow if it .
A. isn ’ t rain
B. rain
C. won ’ t rain
D. doesn ’ t rain
7.—Do you know when he will come back tomorrow?
--Sorry, I don ’t know. When he back, I ’ll tell you.
A. comes
B. will come
C. come
D. may come
8.What will you do if you to the old folk ’ s home visit?
A.go
B. went
C.going
D. will go
9.If I eat food, I very ’fat.ll be
A.too many
B. many too
C. too much
D. much too
10.I ’ ll give the book to him if he here next Sunday.
A. will come
B. comes
C. is coming
D. came
11.There an English film in our school tomorrow.
A. is going to have
B. will have
C. is going to be
D. has
12.Could you tell us where ？
A.will the next Olympic Games held
B.the next Olympic Games will be held
C.would the next Olympic Games be held
D.the next Olympic Games would be held
13.When my mother returned last night, I a book.
A. read
B. am reading
C. was reading
D. am going to read
14.What you when it began to rain?
A. do, do
B. were, doing
C. are, doing
D. did, do
15. I
A.will ’ ll wake you up when he back.
B.is going to come
C. comes
D. come
1---5 CDBAD 6---10 DAACB 11---15 CBCBC。