if与unless专项练习
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。
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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（） 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 doing they were doingC. what they were doing 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they want fried chicken He asked the boys.(改为宾语从句)àHe asked the boys _______they ______fried chicken.the watch made in ShanghaiI 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 tomorrow. (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。