if与unless专项练习

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if引导的条件状语从句讲解和练习(答案)

t 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 ’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 protectingthe 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。

英语语法专题条件状语从句(讲解+练习,无答案)

中考语法专题条件状语从句（讲解+练习，无答案）条件状语从句常用引导词：if, unless, as/so long as1、if 从句 + 祈使句，“如果……，就……”If you do not feel well, please go to see the doctor. 如果你感觉不舒服，就去看医生吧。

If you want to know more about it, call now. 如果你想了解更多内容，现在就打电话吧。

Make sure you visit the Science Museum if you ever go to London. 如果你去伦敦，一定要去参观科学博物馆。

2、主将从现If I start after dinner, I’ll finish it before I go to bed. 如果我晚饭后开始，睡觉前我就能完成。

主句也可用“情态动词 + 动词原形” She may come with us if she arrives in time. 如果她来得及时，就可以和我们一起去。

3、if 条件状语从句和并列句的转换Hurry up, or you’ll be late. = If you don’t hurry up, you’ll be late. Study hard and you will pass the exam. = If you study hard, you will pass the exam. 练习（一）句型转换 1. Run fast, or you’ll be late for school. _______ you _______ _______ fast, you’ll be late for school. 2. You can buy the dictionary if you take enough money with you. Take enough money with you, _______ _______ _______ buy the dictionary. 3. If there is no air, none of us can live. None of us can live _______ _______.4、unless “除非”Don’t leave the building unless I tell you to. 不要离开大楼，除非我准许。

新概念第二册第16课if引导的条件状语从句讲解和练习(基础题)

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 you study hard, you will pass the exam.Hurry up, or you’ll be late. =If you don’t hurry up, you’ll be late.考题Work hard，________ you may catch up with your classmates soon.A.orB.butC.andD.yet思路解析：本句是“祈使句＋and”的句型，句意为“努力学习，你会很快赶上其他同学的”，and在句中表示承接关系，所以选C项。

Unit+6if+unless引导的条件状语从句语法提升练2023-2024学年九年级英语上册

2023-2024学年九年级英语上册单元模块满分必刷题（牛津译林版）Unit 6 TV programmes【刷语法】if unless引导的条件状语从句(重点语法提升练)条件状语从句条件状语从句的引导词主要有as long as(只要), if（如果）, unless（除非）。

在条件状语从句中，从句常用一般现在时表将来，即主将从现。

如：You will fail the exam if you don’t work hard.=You will fail the exam unless you work hard.如果不努力学习，你考试会不及格的。

一、单项选择1．As we live in a rapidly developing world, we will be left behind ________ we keep learning.A．unless B．if C．after D．though2．For our safety, we must keep away from the tall buildings ________ the wind blows hard.A．if B．although C．so3．—Lucy, the Dragon Boat Festival is coming. I want to learn how to make zongzi.—OK. If my grandma ________ free tomorrow, she will teach us.A．is B．are C．am D．will be4．Miss Xu goes jogging in Huanghe Park every morning ________ it rains.A．unless B．till C．since D．as5．My parents won’t allow me to do things I like ________ I finish my homework.A．if B．but C．because D．unless6．It is really dangerous _______ people run the red traffic light.A．if B．unless C．though D．until7．You won’t pass the PE exam successfully ________ you exercise every day.A．if B．unless C．as long as8．Our country will be much better for everyone in future ________ we all do something to help now.A．if B．before C．so that D．even though9．________ you treat others with your heart, you will get friendship in return.A．If B．Until C．Unless10．—Do you go to the party?—No. ________ you go with me.A．Because B．Unless C．Until D．Though11．You won’t be successful ________ you don’t try your best to do something.A．if B．although C．unless D．until12．—It’s impossible to finish the difficult task in such a short time on my own ________ both of us work together.—No problem. Let’s start!A．if B．until C．unless13．—It’s really difficult for me to play the pipa.—Come on! You’ll succeed ________you give up halfway.A．if B．unless C．though14．There are fewer and fewer tigers in India. The situation will continue ________ humans stop hunting them for their fur and bones.A．since B．unless C．because15．—Mr. Miller, I feel too tired to sleep well under too much pressure.—I’m so sorry to hear that. As we all know, ________ you relax, stress can become a risk to your health.A．unless B．if C．when D．because16．We are sure to have a bright future ________ we all try our best.A．if B．unless C．though17．No one would like to make friends with you ________ you learn to understand and respect others.A．unless B．or C．since18．—You will never get anywhere __________ you have set your goal.—I quite agree with you.A．if B．unless C．since19．You need to practice speaking every day ______ you hope to improve your spoken English.A．if B．while C．unless20．If you finish your homework, your mother ________ you go out.A．lets B．will let C．doesn’t let D．don’t let21．The weather is getting hotter. Food may quickly go bad ________ it is put into the fridge.A．if B．while C．unless D．until22．My mom will not allow me to hang out ________ I promise to come back before 9 p.m.A．unless B．when C．since D．as soon as 23．—My best friend won’t go abroad ________ he can get his parents’ company (陪伴).—He is right. Traveling alone isn’t safe enough abroad.A．as soon as B．if C．unless24．—________ you come to Shanghai for a visit, please call me. I will show you around.—Thanks a lot.A．Although B．If C．Unless25．I’ll give the book to Alan ________ he comes here.A．before B．unless C．though D．if二、用所给单词的正确形式填空26．If it (not rain) tomorrow, we will go to collect waste water for recycling.27．The football match (not cancel) unless it rains heavily next Saturday. 28．—Mum, could I play football with my friends this afternoon?—Of course, if your homework (finish).29．As long as you keep on practicing and never give up, you (succeed), I think. 30．They say the place may be polluted if some factories (build) in the future.31．If it rains tomorrow, I (stay) at home.32．We won’t go to movies if it (rain) tomorrow.33．Dad says we will go camping this weekend if it （not be）rainy.34．If the problem (not mention), it will be forgotten sooner or later.35．There is no need to store more than enough rice if the government (control) the price.三、完成句子36．如果明天不下雨，我们就去野炊。

Unit 7单元If 和 Unless引导的条件状语从句牛津深圳版八年级英语上册

If/Unless引导的条件状语从句【典型例句】1.If you take a fish out of water, it dies.2.If you live a healthy life, your memory will work better.3.If you forget the meaning of the word, you can look it up in the dictionary.4.Put up your hands if you have any questions.5.Unless you get enough sleep every night, you will not remember things well.一、概念“If 如果”，它引导的句子表示某事发生的条件，即“在......条件下某事才能发生”，在句子中充当状语。

二、用法(1)如果if / unless条件句讲述自然规律，肯定会发生的事情或客观事实，主句和if从句都用一般现在时态。

(主现从现)(2)在if / unless引导的条件状语从句中，谈论将来可能出现的情况时：(3) unless = if …… not…… “除非；如果不…”(4)除了if / unless引导的从句,还可由when, as soon as, not…until来引导一般将来时从句：一般现在时主句情态动词祈使句*从句和主句可互换位置If you take a fish out of water, it dies.= The fish dies if it you take it out of water. (主现从现)If you live a healthy life, your memory will work better.=Your memory will work better if you live a healthy life. (主将从现)If you forget the meaning of the word, you can look it up in the dictionary.=You can look it up if you forget the meaning of the word. (主情从现)Put up your hands if you have any questions.=If you have any questions, out up your hands. (主祈从现)Unless you get enough sleep every night, you will not remember things well.=You will not remember things well unless you get enough sleep every night.=If you don’t get enough sleep every night, you will not remember things well. Unless you get up early, you will be late.=You will be late unless you get up early.=If you don’t get up early, you will be late三、练习I.用括号内所给词的适当形式填空。

unless, if 练习

练习题 1. If I ________ his phone number, I will tell you. A. find B. found C. will find D. have found 2. We will go camping if it _______ tomorrow. A. Won’t rain B. didn’t rain C. doesn’t rain D. isn’t raining 3. I’m waiting for my friend. If he _______, I ______ swimming alone. A. doesn’t come; will go B. won’t come; will go C. will come; won’t go D. don’t come; will go 4. ______ you go to the supermarket at 7 p.m, you can buy a lot of cheap food. A. If B. Unless C. Whether D. When 5. I won’t get to the party on time ______ I catch the first train tomorrow morning. A. If B. Unless C. Whether D. When 6. ------Shall we go on a picnic this weekend? ------Good idea! Unless it _______. A. rains B. doesn’t rain C. rain D. won’t rain 7. -----Can I change the jacket for another one ______ it doesn’t fit me well ----- Of course. A. unless B. if C. that D. though 8. Nobody can learn maths wellhe works hard on it. A. if B unless C thought D however 9. If fishaway from water, theydie. A are taking, won’t B are taken, will C are being taken, will D take, won’t 10. Each student can ask teachers for help if heA用if或unless填空 1.he wants to see me, you can tell him to wait. 2.it snows tomorrow, we’ll have a day or two off. 3. We won’t go to his partyhe invites us. 4. She is sure to pass the examinationshe is ill. 5. I’ll take that computerI have enough money. 6.my grandma wears glasses, she can see better. 7. I won’t buy that backpackit costs less than $20 8.I’m tired; I’ll have a rest for tea. 9. You won’t get paid for time offyou have a doctor’s note. 10. you will get a toothacheyou do clean your teeth regularly. B 用所给单词的适当形式填空 1. If he(get) a low mark in the test, he(study) harder. 2. If you(swim) every day this summer, you(be) very healthy. 3. If he(not hurry), he(not see) the beginning of the match. 4. You can’t go out unless you(finish) your homework. 5. Unless I save my money carefully, I(not be) able to buy a football. 6. If it(not rain) tomorrow, we(go) to the park. 7. If he(return) to the school, I(let) you know. 8. Hesmoking unless he(have) enough money. 9. They can remember it better if someone (give) them some advice about it. 10. The man(set off) if he(buy) the air ticket. 二解释句子 1. you will feel worse unless you take more rest.2. you will be late for work if you don’t hurry up.3. no one is going to help you unless you change your mind.。

九年级英语状语从句连接词练习题40题答案解析

九年级英语状语从句连接词练习题40题答案解析1.We will go for a picnic if it is sunny tomorrow.A.whenB.ifC.unlessD.until答案解析：B。

本题考查条件状语从句连接词的用法。

“if”表示如果，引导条件状语从句，符合语境。

“when”表示当……的时候；“unless”表示除非；“until”表示直到……才。

在这个句子中，是在假设明天天气晴朗的情况下我们去野餐，所以用“if”最合适。

2.I was doing my homework while my mother was cooking.A.whenB.whileC.asD.since答案解析：B。

本题考查时间状语从句连接词的用法。

“while”表示当……的时候，强调两个动作同时进行。

“when”也有当……的时候的意思，但没有“while”那么强调同时性。

“as”表示随着；“since”表示自从。

在这个句子中，我在做作业和妈妈在做饭是同时进行的，所以用“while”。

3.She has been learning English since she was seven.A.whenB.whileC.as答案解析：D。

本题考查时间状语从句连接词的用法。

“since”表示自从，后面跟一个时间点，常与现在完成进行时连用。

“when”“while”“as”都不符合这个语境。

在这个句子中，她从七岁开始一直在学英语，所以用“since”。

4.I will call you as soon as I arrive.A.whenB.as soon asC.whileD.until答案解析：B。

本题考查时间状语从句连接词的用法。

“as soon as”表示一……就……，符合语境。

“when”表示当……的时候；“while”表示当……的时候，强调两个动作同时进行；“until”表示直到……才。

在这个句子中，我一到达就给你打电话，所以用“as soon as”。

中考英语由-if-和unless-引导的条件状语从句

由if 和unless 引导的条件状语从句1. If we lose our short-term memory, we forget things happening recently.译：______________________________________________________2. If the picture is silly, strange and colorful, you will remember it better.译：______________________________________________________A: If sentences: actions with definite results. 有必然结果发生的行动eg: ①If you go into a clothes shop, you find clothes.②If you go into a car showroom, you see cars.③Water turns into ice if you cool it.④The wood floats if you put it into water.Conclusion:1). 如果if 条件句谈论的是重复发生和预示必定要发生的情景和事件，则主从句大多用一般现在时态。

2). 在if 条件句中，if 条件从句可以放在前面，也可以放在后面。

当if 引导的条件从句放在前面时，后面常用逗号隔开。

B: If sentences: actions with possible results. 有可能性结果发生的行动eg: 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．在if 引导的条件状语从句中,如果从句谈论的是一个有可能发生的事实及其产生的相关的结果，主句用一般将来时态，从句用一般现在时态。

寒假作业05If和Unless条件状语从句-2024年八年级英语寒假培优练(牛津深圳版)

限时练习：40min 完成时间：月日天气：作业05 If和Unless引导的条件状语从句【语法概述】在复合句中作条件状语的句子叫____条件状语从句__.条件状语从句常用__if/ unless_来引导。

【句子结构】If 引导的条件状语从句位置灵活，可直接放在主句后面，也可以放在句首。

放句首时，从句后面要用逗号和主句隔开。

If it rains tomorrow, we will not go to the zoo. 如果明天下雨，我们就不去动物园。

条件状语从句主句What will you go if you find someone in danger? 如果你发现某人有危险，你会怎么做？主句条件状语从句【具体用法】If 引导的真实条件状语从句类型时态例句用if条件句表达客观真理或普通现象主现从现 A fish dies if you take it out of water.用if 条件句表示将来可能发生的事情主将从现I will tell her if I see her.主祈从现If the light is red, wait for a minute.主情从现If we hurry now, we can stop for coffee later.△unless=if…not除非，如果不unless连接条件状语从句，在用unless表示将来情况时，主句用将来时，从句要用一般时表将来，此种用法适用于条件状语从句和时间状语从句。

小试牛刀：除非他被邀请否则他不会来=如果他不被邀请的话他将不会来。

He won't e unless he is invited.= He won’t e if he isn’t invited.记忆口诀：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。

一、单项选择1．Learning to write is learning to think. You don’t know things clearly ________ you can write them down.A．unless B．if C．when D．after【答案】A【详解】句意：学习写作就是学习思考。

条件状语从句练习题及答案

条件状语从句练习题及答案1. 如果你明天有空，我们一起去看电影吧。

- If you are free tomorrow, we will go to see a movie together.2. 只有当你完成作业后，你才能玩游戏。

- You can play games only after you finish your homework.3. 除非我们早些出发，否则我们将错过火车。

- We will miss the train unless we leave early.4. 我会帮你，如果你需要的话。

- I will help you if you need it.5. 他不会来参加聚会，除非他被邀请。

- He won't come to the party unless he is invited.6. 只要我们努力工作，我们就能实现我们的目标。

- We can achieve our goals as long as we work hard.7. 我会告诉你这个秘密，如果你保证不告诉别人。

- I will tell you this secret if you promise not to tell anyone else.8. 她不会原谅他，如果她知道他撒谎了。

- She won't forgive him if she knew he lied.答案1. If you are free tomorrow, we will go to see a movie together.- 正确答案：If you are free tomorrow, we will go to see a movie together.2. You can play games only after you finish your homework.- 正确答案：You can play games only after you finish your homework.3. We will miss the train unless we leave early.- 正确答案：We will miss the train unless we leave early.4. I will help you if you need it.- 正确答案：I will help you if you need it.5. He won't come to the party unless he is invited.- 正确答案：He won't come to the party unless he is invited.6. We can achieve our goals as long as we work hard.- 正确答案：We can achieve our goals as long as we work hard.7. I will tell you this secret if you promise not to tell anyone else.- 正确答案：I will tell you this secret if you promise not to tell anyone else.8. She won't forgive him if she knew he lied.- 正确答案：She won't forgive him if she knew he lied.这些练习题涵盖了不同类型的条件状语从句，包括第一条件（真实条件句）、第二条件（非真实条件句）和第三条件（过去的非真实条件句）。

(完整word版)if与unless专项练习

If, unless 专项练习一、完成下列句子1. I’m sure if he _____(go) to the party, he________ (have) a great time.2. If the rain _______(stop) tonight, we will go to the cinema.3. I’ll buy a computer if I ______(have) enough money.4. You _________(not get) nervous if you _____(do ) enough exercise.5. I want to know if he _________(come) tomorrow, if he _______(come), I __________(give) the massage to him.6. Comrade Wang didn't know if there _______ (be) on English evening that day.7. Please tell me if she _______ (come) again next time.8. Mike asked me if we _______(ask) any questions the next class.9．The twins ______________ (fight) if they_______________ (argue).10. I ____________ (have) a bake sale if I _____________ (need) money for education.二、选择( )1. I don’t know _____ he will come tomorrow. _____ he comes, I’ll tell you.A. if; WhetherB. whether; WhetherC. if; ThatD. if; if( ) 2. He said he would help me with my maths if he _______ free.A．was B．will be C．would be D．is( ) 3. Tommy, do you know if Frank ________ to the zoo 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 fine( ) 4. -Listen! It is still noisy in the head teacher’s office.-Go and see ________ they have finished correcting the papers yet.A. thoughB. whetherC. unlessD. while( ) 5. He asked me ________ we could go to Beijing to watch the game by plane.A. thatB. ifC. howD. what（）6 . The volleyball match will be put off if it ______.A. will rainB. rainsC. rainedD. is raining（）7. Difficulties are nothing if we ______ not afraid of themA. willB. shallC. areD. do（）8. I don’t like to be interrupted if I______.A. speakB. will speakC. am speakingD. spoke （）9. If you______ the book you will understand the story better.A. will be readingB. have readC. will have readD. read( ) 10. There is going to______ a sports meeting next week. If it ______ , we’ll have to cancel it..A. be; will rainB. have; will rainC. be; rainsD. give; is going to rain（）11. If you ______ a chance to study in a foreign country, just take it.A. gettingB. had gotC. will getD. get( ) 12. I want to know if they ____ the spring sports meeting next month.If they ____ it, I must get ready for it.A. hold; will holdB. will hold; holdC. hold; holdD. will hold; will hold（）13. –Look, what have you done?-Sorry. I think if I ________ another chance, I’ll do it better.A. giveB. will be givenC. will giveD. am given（）14.If you _______ him tomorrow, please ask him if he ______ to work on the farm with us.A. see ; goesB. will see; goesC. will see; will goD. see; will go( ) 15. It makes no difference __________.A. whether will you come tomorrow.B. Whether or not will be pass the examC. If he will come to the meeting or notD. Whether he will come to the meeting or not( ) 16. Even now many people still remembered ________ when hey heard about the 1976 earthquake in Tangshan.A. what were they doingB.that they were doingC. what they were doingD.if they were doing( ) 17. In summer, food goes bad easily _____ it is put in the refrigerator.A. untilB. ifC. unlessD. since( ) 18. –I hear Jack Chan will come to Shanghai next week.-Really? _______ he comes, my younger sister will be very happy.A. IfB. UntilC. UnlessD. Before( ) 19. We will have no water to drink______ we don’t protect the earth.A．until B. before C. though D. if( ) 20 –May I surf the Internet now?- No, _______ you have finished doing the dishes.A. unlessB. ifC. becauseD. when三、句型转换1.Do they want fried chicken? He asked the boys.(改为宾语从句)àHe asked the boys _______they ______fried chicken.2.Was the watch made in Shanghai?I don’t know.(改为宾语从句)àI don’t know_ ______the watch _______made in Shanghai.3..“Do you want to try something new?”Tom’s mother asked him.(同义句)Tom’s mother asked him _____________________to try something new.4. “Do you wash your clothes yourself?” Tom asked the girl next to him.(改复合句)Tom asked the girl next to him ______ ______ ______ her clothes herself.5. Did Peter come here yesterday? Li Lei wants to know. (改为宾从)Li Lei wants to know ______ Peter ______ here yesterday.6、You want to record. You should press the red button.(合并成含if的条件句)________________________________________________________________.7、I will go swimming. It won’t be cold tomo rrow. (合并成含if的条件句)_________________________________________________________________.8、“Do you want to try something new?” Tom’s mother asked him. (改为复合句,句意不变) Tom’s mother asked him________________to try something new.9.我还没有决定是否去参加迈克的生日聚会。

条件状语从句总结及练习

Unit 6TV programs条件状语从句条件状语从句精讲1. if 和unlessif 表示正面的条件, 意为“如果”; unless 表示反面的条件, 意为“除非, 如果不”( if...not )。

例如:I f he doesn’t come before 12 o’clock, we won’t wait for him. 如果他12 点前不来, 我们就不等他了。

I shall go tomorrow unless it rains. 除非明天下雨, 否则我就要走了。

if...not 和unless 通常是可以换用的。

例如:If you don’t have a good command of English grammar, you won’t write good English.Unless you have a good command of English grammar, you won’t write good English.条件状语从句专项练习一、单选题1. We can’t start having dinner _______ there are old people. We must let them sit down and eat first.A. andB. orC. ifD. but2. I won't watch basketball matches_______ James is playing. He pays much attention to teamwork.A. unlessB. ifC. althoughD. since3. The old library will close soon________ people can give some money to support it.A. ifB. unlessC. becauseD. although4. You will be able to see something you climb onto those rocks.A. ifB. thoughC. untilD. unless5. —The novel seems a little boring.—You won’t enjoy it _______________ you put your heart into it.A. whenB. ifC. afterD. unless6. —What bad weather!—Yes. If it _______raining, the fields will be covered with water soon.A. go onB. goes onC. will goD. went on7. —Does Ted tell you if he _____ next Sunday?—No, he doesn’t. But if he _____ , I will give you a ring.A. comes; will comeB. comes; comesC. will come; comes8. —The sports meeting will continue ________ it rains this afternoon.—I hope it won’t rain then.A. unlessB. ifC. sinceD. as soon as9. If you ______ up the word in the dictionary, you ______ out its meaning.A. look; findB. will look; will findC. look; will findD. will look; find10. _________we had a map, we couldn’t find the museum easily.A. AlthoughB. SinceC. UnlessD. When11. We will go to the park _______________ the weather is good.A. as long asB. as much asC. as good asD. as well as12. We will go for a picnic if it tomorrow.A. doesn’t rainB. wasn’t rainyC. won’t rainD. wasn’t raining13. —I wonder if our foreign teacher Mr. White________ to his hometown next Tuesday.—I’m not sure. But if he returns to his hometown, I ________him off.A. returns; seeB. will return; seeC. will return; will seeD. return; will see14. Restaurants must stop offering free plastic bags in Beijing _______ customers ask for them.A. sinceB. unlessC. because15. Studying in groups is necessary _________________ you want to do well in school.二、用所给动词的适当形式填空1. If it ___________ (be) fine, what will you do tomorrow?is2. We ________________ (be) late unless we speed up. will be3. If you ask my name, it ___________ (be) Henry. is4. Unless you ___________ (take) more care, you’ll have an accident. take5. We will stay at home if my aunt ___________ (come) to visit us tomorrow. comes6. Don't worry about your boy. His temperature ____________ (drop) back to normal if he takes this medicine．will drop7. We _____________ (punish) if we take no action to protect the environment. will be punished8. You ________________ (not hear) anything unless you listen carefully. won’t hear9. Please________________ (not cross) the road if the light is red.don’t cross10. You may ___________ (use) my dictionary as long as you________________ (not keep) it too long. use don’tkeep三、同义句转换1. If you help me, I’ll finish my job soon.__________ __________ __________, I’ll finish my job soon. With your help2. If there is no water, fish may die.Fish may __________ __________ __________.die without water3. You will fail the exam if you don’t work hard.You will fail the exam __________ __________ __________hard. unless you work4. Unless you obey the rules, you will be punished.If __________ __________ obey the rules, you will be punished. don’t obey5. Nobody can learn English well if he doesn’t work hard on it.Nobody can learn English well __________ __________ __________hard on it. unless he works四、翻译1. 如果树少了，就会有更多的污染。

unless if转换

unless与if…not unless和if not均可表示“如果不”，有时用法相同，有时不同，请看题：You’ll miss the train __________ you hurry up.A. unlessB. asC. if notD. until此题应选 A。

容易选C。

其实C只是词序不对，若改为...if you don’t hurry up 也是对的。

在许多情况下，连词until与if...not同义，且可换用(表示一种否定的条件)。

要是不下雨，我们就去。

正：We shall go unless it rains. 正：We shall go if it doesn’t rain.我不打电话给你，你就不要来。

正：Don’t come unless I phone you. 正：Don’t come if I don’t phone you.从以上两例可以看出，unless有时可以与if not换用，但if not中的not必须位于从句谓语中，而不能直接与if连用在一起。

但是注意，即使如此，两者也并不是永远可以换用的：一般说来，两者互换的场合只限于：当我们要去结束一个已经存在的想法或状态时（而不是去开始一种新的想法或状态)。

试体会：I’ll stay at home unless I am invited (=if I am not invited) to the party. 要是不邀请我去参加晚会，我就呆在家里。

(即“邀请我参加晚会”会结束“我将呆在家里”这一现在的打算)若要表示所述条件会导致一种新的想法或情况，通常要用if...not，而不用unless。

试体会：I’ll be angry if I’m not invited to the part y. 如果不邀请我参加晚会，我会生气的。

(即“不邀请我去参加晚会”会导致一种新情况—-“我会生气”)一、unless的基本用法连词unless意为“除非……如果不……”，“除了……”，多引导一个否定意义的真实条件句，有时也可引导非真实条件旬。

unless,if,as long as引导的条件状语从句

"Unless" 表示"除非"，"如果不"，用于表示某件事情只有在某个条件不满足时才会发生。

例句：1.You won't get the job unless you have relevantexperience.2.I won't go out unless it stops raining.3.Unless you study hard, you will not pass the exam.4.Unless you finish your homework, you cannot go to theparty."If" 表示"如果"，用于表示某件事情只有在某个条件满足时才会发生。

例如：1.She will not go to the party if she doesn't get aninvitation.2.If it rains tomorrow, we will stay at home.3.If you work hard, you will succeed.4.If she arrives on time, we can start the meeting.5.If it rains tomorrow, we will postpone the game."As long as" 表示"只要"，用于表示某件事情只要满足某个条件就会发生。

例如：1.As long as you study hard, you will pass the exam.2.As long as you're happy, I'm happy too.3.We can finish the project as long as we have enoughresources.4.As long as you are happy, I don't care about anythingelse.5.As long as you work hard, you will achieve your goals.。

条件状语从句用法练习if,unless

条件状语从句：if/unless1. If I ______ his phone number, I will tell you.A. findB. foundC. will findD. have found参考答案：Aif条件句中，主句用一般将来时，从句用一般现在时表示将来的时间，即“主将从现”，故正确答案为A。

2. We will go camping if it ______ tomorrow.A. w on’t rainB. d idn’t rainC. doesn’t rainD. isn’t raining参考答案：Cif条件句中，从句用一般现在时，主语是第三人称单数时，否定结构是主语+doesn’t+动词原形，故正确答案为C。

3. I’m waiting for my friend. If he ______ , I ______ swimming alone.A. doesn’t come; will goB. won’t come; will goC. will come; won’t goD. don’t come; will go参考答案：Aif条件句中，主句用一般将来时，从句用一般现在时，又因从句中主语是第三人称单数，因此否定结构助动词用doesn’t，故正确答案为A。

4. 选择适当的单词填空。

I’ll take that computer ______ I have enough money. (if/unless)根据句意应该是“如果我有足够的钱的话，我会买这台电脑的”，故该空应填if。

5.用括号中所给单词的适当形式完成句子。

If he gets low mark in the test, he ______ harder. (study)参考答案：will studyif条件句中，主句用一般将来时，故该空应填will study。

6. 用括号中所给单词的适当形式完成句子。

if引导的条件状语从句练习题

if引导的条件状语从句练习题条件状语从句是英语语法中的重要部分，它以if引导，用来表达某种情况的条件。

掌握条件状语从句的用法和结构对于提高英语写作和阅读水平至关重要。

本文将给出一些关于条件状语从句的练习题，帮助读者巩固和提升自己的语法能力。

1. 根据句意，用所给的动词的适当形式填空。

a) If it (rain) tomorrow, we (stay) at home.b) If I (see) him, I (give) him your message.c) He (not go) to the party if he (not finish) his work.d) If I (have) enough money, I (buy) a new car.2. 根据句意，从括号中选择合适的词填空。

a) If I _______ (be) you, I would apologize.b) She will be late for work _______ (if, unless) she hurries up.c) We won't go to the beach _______ (unless, when) it stops raining.d) _______ (If, When) she arrives, please let me know.3. 根据所给的条件状语从句，选择正确的答案。

a) If I _______ (have) a lot of money, I _______ (travel) around the world.1. will have, will travel2. have, will travel3. had, would travelb) If he _______ (study) harder, he _______ (pass) the exam.1. study, will pass2. will study, passes3. studies, will passc) They will go to the party _______ (if, unless) it _______ (rain).1. if, rains2. unless, rains3. if, will rain4. 根据句意，将下列句子改写成条件状语从句。

Unit 7 Grammar重点语法if和unless引导的条件状语从句-八年级英语上册单元重难点

班级姓名学号分数Unit 7 Memoryif和unless引导的条件状语从句（时间：60分钟，满分：90分）一、单项选择(本大题共40小题，每小题1分，共40分)1．If you ________ too much time online, it will hurt your eyes badly.A．spend B．spent C．will spend D．are spending 2．Boys and girls, believe in yourself. If you ________ hard, your dream will come true. A．will study B．studied C．study D．are studying 3．The four children will climb the West Hill if it ________ rain next Sunday.A．isn’t B．doesn’t C．won’t D．didn’t 4．Jessica says she will go camping with us tomorrow if her homework _________.A．will finish B．finishes C．is finished D．will be finished 5．You can taste the delicious Yunnan Rice Noodles ________ you go to Yunnan.A．so B．and C．if D．but6．I will go to the beach if it ________ tomorrow.A．is raining B．rains C．doesn’t rain D．won’t rain 7．I’m waiting for my friend. ________, I’ll go shopping online.A．If she comes B．If she will come C．If she doesn’t come D．If she didn’t come 8．What ________ if I ________ my homework tommorrow?A．will happen; don’t finish B．will happen; didn’t finish C．happen; won’t finish D．happen; didn’t finish9．Kitty, our teacher won’t let you in school _________ you don’t wear a mask.A．so B．when C．if D．unless 10．She won’t be happy if she this mess.A．will see B．sees C．saw D．to see 11．Hurry up, Jim. You’ll be late for school ________ you don’t leave now.A．if B．when C．unless D．after 12．—Excuse me, could you please wake me up if my friend ________ here?—Of course, but we still don’t know when your friend ________ here.A．will come; comes B．will come; will come C．comes; will come D．comes; comes13．Meat will go bad quickly in summer _________ we put it in a fridge.A．unless B．as soon as C．until D．although14．Father is too tired today. Don’t call him ________ it is necessary.A．though B．unless C．if15．There are no buses to the beach. ________ you have a car, it’s difficult to get there.A．Since B．When C．Unless D．As soon as 16．Everyone makes mistakes. No one will make progress ________ he is willing to learn from them. A．unless B．if C．though D．because17．—Are you going hiking tomorrow?—Yes, that’s the plan ________ the weather is really bad.A．unless B．so C．if D．as soon as 18．Elephants usually won’t hurt a person ________ one becomes a danger to them.A．because B．unless C．if D．so19．I think you'll miss the train ________ you hurry up.A．if B．and C．unless D．when20．She won't pass the exam ________ she works hard.A．if B．unless C．when21．—Ordering take-away food is popular these days.—Yes. But my mom hardly does that ________ she really has no time to cook for me.A．if B．unless C．because D．so22．You won’t pass your exams ________ you work harder.A．when B．if C．unless D．after23．— Shall we go for a picnic in the forest park tomorrow afternoon?— Sure, ________ it rains heavily.A．although B．since C．unless D．when24．If you work hard, you ________ at last.A．succeed B．succeeded C．will succeed D．have succeeded 25．— We must stay at home to do our homework if it ________ tomorrow.— OK, I agree.A．rain B．is rainy C．will rain D．is raining26．He can’t catch up with the other students ________ he works hard.A．until B．if C．unless27．If you ________ this fast train, you will arrive in Shanghai in five hours.A．take B．will take C．took D．have taken28．I don’t know if he __________ tomorrow. If he __________, I will call you.A．will come, comes B．comes, will comeC．comes, comes D．will come, will come29．________ you must go and play football, wait until school is over.A．Whether B．If C．Because D．Unless30．It will be harmful to your hearing ________ you always listen to music by earphone (耳机).A．if B．so C．and D．but31．If tomorrow________fine, I ________ you to go shopping with me.A．will be; will call B．is; will call C．will be; call32．— If it ________ this Sunday, let’s go to the countryside.— OK! But nobody knows if it will rain in three days.A．won’t rain B．rains C．doesn’t rain33．You should get up a little earlier, _________ you want to catch the first bus to school.A．but B．or C．if D．and34．—What will your English teacher do _______ you eat in class?—He will stop me in a polite way.A．though B．if C．unless D．until35．________ you look after it carefully, this coat will keep you warm through many winters.A．If B．Unless C．Before D．So36．The snow ________ quickly if it is sunny.A．melts B．melt C．won’t melt D．will melt37．My brother will do this job better if he ________ how to use a computer.A．will know B．knows C．know D．knew38．If you _____ out all the candles in one go, the wish ______ true.A．will blow; will come B．blow; will come C．will blow; comes D．blow; comes39．You can surf the Internet ________ you want to know about the 18th World Middle School Games. A．until B．after C．if D．so40．I will be very happy ________ you come to my party.A．if B．though C．or D．and二、用所给单词的正确形式填空(本大题共10小题，每小题2分，共20分)41．If the rain ________ (stop) tonight, we will go to the park.42．If we continue cutting down the trees, we ________ (punish) by nature.43．I will ask her for my bike if she ________ (not return) it to me.44．What ____ (happen) if there is no water on the earth?45．If the boy ____________ (not be) so lazy, he’ll pass the exam.46．She________(not speak) to you if you don’t speak to her first.47．They ________ (fly) to Beijing if there is a holiday this summer.48．Kitty, you ________ (fail) the English exam unless you study hard.49．Unless he ________ (exercise) more, he will get fatter and fatter.50．Unless something unexpected ________(happen), I’ll see you tomorrow.三、句型转换(本大题共10小题，每小题4分，共40分)51．You can’t get good grades unless you work very hard. (同义句)You can’t get good grades _________ you _________ work very hard.52．If we don’t work hard, we won’t succeed in the end.(变为同义句)_________we _________ _________, we won’t succeed in the end.53．I won’t go to the dancing party unless they invite me. (改为同义句)I ________ go to the dancing party ________ they invite me.54．I won’t go to her birthday party unless she invites me. (同义句转换)I won’t go to her birthday party ________ she ________ ________ me.55．If you are tired, you can have a rest. (同义句转化)________ ________ ________ if you ________ tired.56．If you don’t study hard, you won’t get good grades. (改为同义句)You won’t get good grades ________ you ________ hard.57．They invite me. I will go to the dancing party. （将两句合并为一个句子）I ________ go to the dancing party ________ they invite me.58．You will get a fine. You park your car in the wrong place.(合并成一个句子)You ________ get a fine ________ you park your car in the wrong place.59．They are going to do more practice. They will win the match. (改为含有if条件句的复合句) ______ they ______ more practice, they______ ______ the match.60．Ride your bike or you’ll be late. （用if改写句子）You’ll be late if you __________ __________ your bike.参考答案：1．A【解析】句意：如果你花太多时间上网，那将会严重伤害你的眼睛。

if条件状语从句练习与答案

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.If you to the party, you'll have a great time.a. will gob. wentc. god. going2.1t 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 _____ m e.a.can tell, will askb. will tell, will askc. would tell, askd. will tell, asksb.- 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 _____ b ack, 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 too10.1’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.2.will b. is going to come c. comes d. 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.na(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。

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