if条件句讲解及练习

if 引导的条件句

if 引导的条件句if引导的条件句表示在某种条件下，会导致另一事发生。

句式为if +从句，主句。

中文意思是“如果某事发生（或不发生），另一事就（不）发生”。

通常分以下两种情形：一、真实条件句1. if从句和主句都用一般现在时，表示客观真理或习惯和持续发生的事情。

如：If the moon goes near the earth, the tide goes high. 如果月亮离地球距离近，潮水就高。

2. if从句用一般现在时，主句用一般将来时，表示从句中的动作如果发生，那么主句中的动作也将发生。

如：If it stops raining later this afternoon, we will eat out. 如果今天下午晚些时候雨能停，我们就出去吃饭。

3. if从句用一般现在时，主句用祈使句，表示给某人提建议或命令某人做某事，及提出建议或请求。

如：If you are not likely to be in town, please let me know. 如果你不可能在城里，请让我知道。

二、虚拟条件句虚拟条件句，也称非真实条件句，表示在某种假想的条件下，将导致某事发生。

从句中所陈述的事情仅仅只是说话者的想法，不是事实，也不可能发生。

1. if从句用一般过去时（did / were），主句用would / could / should / might + do，表示现在不可能发生的事情，if 从句中所陈述的事情与现在的事实相反。

如：If I were Liu Xiang, I would train hard for the 2008 Olympic Games.如果我是刘翔，我会为了2008年奥运会努力训练。

2. if从句用一般过去时（did / were或 were to + do），主句用would / could / should / might + do。

表示将来不可能发生的事情，if 从句中所陈述的事情与将来的事实相反。

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。

条件副词练习

条件副词练习
条件副词是用于描述一个动作或情况发生的条件。

它们用于表达特定的情况下会发生或不会发生的情况。

以下是一些条件副词的常见用法和一些练。

1. 如果 (If)
- 如果你不来，我将一个人去。

- 我们可以去公园散步，如果天气好的话。

- 如果你愿意的话，我可以帮你研究。

2. 除非 (Unless)
- 除非明天下雨，否则我们会去露营。

- 除非你研究努力，你不会通过考试。

- 除非遇到紧急情况，否则请勿打扰。

3. 假如 (Suppose)
- 假如你获得了那份工作，你会搬到那座城市吗？
- 假如他们提供住宿，你会参加这个活动吗？
- 假如你很忙，我可以帮你完成这个任务。

4. 只要 (As long as)
- 只要你努力研究，你一定会成功。

- 只要你不放弃，你就能达到目标。

- 只要你来参加会议，我就会告诉你最新的消息。

这些是一些常见的条件副词的用法示例。

通过使用条件副词，我们可以更好地表达不同情况下的可能性和条件。

练使用这些条件副词，将帮助你更加流利地运用它们。

以上是关于条件副词练习的内容。

希望对你有帮助！。

if引导的条件句是什么从句

if引导的条件句是什么从句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：叙述真实可能发生的事情；例句：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。

扩展资料2、非真实条件句：虚拟语气的一种，表示与实际已发生事实相反：例句：If I were you, I would invite him.如果我是你，我会邀请他。

3、另一个常用连词为unless,大多数时候意思与 if not 相近：例句：Let's go out for a walk unless you are too tired.我们出去散步吧，除非你太累了。

例句：If you are not too tired, let's go out for a walk.如果你不太累，我们出去散步吧。

条件状语从句的基本用法1、用if引导：if意为“如果”。

例句：If you cheat in the exam you’ll never get away with it.考试作弊必予追究。

2、用unless引导：unless的意思是“如果不”“除非”。

例句：Unless you go at once you will be late.如果你不马上走，就会迟到的'。

3、用as [so] long as引导：as [so] long as的意思是“如果”“只要”。

例句：I’ll remember that day as long as I live.只要我活着，我就不会忘记那个日子。

4、用in case引导：in case用连词引导条件状语从句时，其意为“如果”“万一”。

例句：In case I forget, please remind me about it.万一我忘记，请提醒我一下。

5、条件状语从句的时态：当主句为将来时态或含有将来意义时，条件状语从句习惯上要用一般现在时表示将来意义，而不能直接使用将来时态。

if条件句讲解及练习If I were you, I would not let out the secret.如果我是你的话，我不会泄露这个秘密的。

If I knew his new address, I would tell you.如果我知道他的新地址，我会告诉你的。

If he studied harder, he would pass the exam.如果他学习再努力点的话，他会通过考试的。

If we had made fuller preparation, we should have won the game.如果我们做了更充分的准备的话，我们肯定就赢了这场比赛。

If you had taken my advice, you wouldn’t have been late forthe meeting.如果你听了我的建议，你开会就不会迟到了。

If she were to/should come, I would tell her the secret.万一她来的话，我会告诉她这个秘密。

（2）省略if的虚拟条件句在含有were, had, 或者should 等词的虚拟条件句中，可以省略if, 将were, had或者should这些助动词放在句首。

如：Were I you, I would not let out the secret.Had we made fuller preparation, we should have won the game.Had you taken my advice, you wouldn’t have been late for the meeting.Should she come, I would tell her the secret.高一语法练习（四）预测、if条件句及虚拟语气一、单项选择1. If I _____ where he lived, I _____ a note to him.A. know, would have sentB. had known, would have sentC. know, would sendD. knew, would have sent2. Mary is ill today. If she _____, she _____ absent from school.A. were not il l; wouldn’t beB. had been ill; wouldn’t have beenC. had been ill; should have beenD. hadn’t been ill; could be3. He acted as if he _____ everything in the world.A. knewB. knowsC. has knownD. won't know4. If you had enough money, what _____?A. will you buyB. would you buyC. would you have boughtD. will you have bought5. If Mr. Young _____ with justice, he _____ such a wrong thing.A. were treated; wouldn’t doB. had been treated; wouldn’t have doneC. were treated; wouldn’t have doneD. had been treated; wouldn’t do6. What _____ if there _____ no light during the day?A. will happen; wasB. would happen; isC. happens; wereD. would happen; were7. The spokesman acted that way as if he _____ anything about the accident but actually he did.A. doesn’t hearB. didn’t hearC. haven’t heardD. hadn’t heard8. If it _____ not for the fact that you _____ ill now, I would surely punish you.A. is; areB. were; wereC. were; areD. was; were9. Many Chinese movie stars now have given up their Chinese nationality. If I were them, I _____ that.A. shouldn’t doB. didn’t doC. hadn’t doneD. won’t do10. I want to get back by 5 o’c lock if _____.A. likelyB. canC. possibleD. probable11. It seems as if it _____ already summer now but it is only February.A. isB. wasC. wereD. had been12. If Henry had not pulled his cap low over his brow, he _____ by the police.A. might be recognizedB. might have been recognizedC. would have recognizedD. was to have been recognized13. There is a ring at the door. That _____ be the postman, I suppose.A. willB. wouldC. is going toD. was going to14. Look at the dark clouds—there _____ be a storm.A. willB. must have beenC. is going toD. would15. —Why are you taking the pictures down?—I _____ the wall.A. paintB. have just paintedC. am going to paintD. will have painted16. —Can I stay at home tomorrow?—Yes, you can if it_____.A. will snowB. is going to snowC. snowsD. snowed17. I don’t know if he _____ this afternoon. But if he _____, I will tell you.A. will come; will do;B. comes; will doC. will come; doesD. comes; does18. —I thought I asked you to fix the radio.—Oh, I’m sorry. I _____ it right away.A. am to doB. will doC. was about to doD. am going to do19. The WTO can’t live up to its name _____ it does not include a country that is home to one fifth of mankind.A. as long asB. whetherC. ifD. even though20. Ask him to ring me up if you _____ him.A. seeB. sawC. would seeD. will see21. It’s so late. I don’t think he ______ come.A. wouldB. shouldC. is going toD. shall22. If people _____ polluting the air, animals and plants will die soon.A. don’t stopB. didn’t stopC. shall not stopD. hav en’t stopped23. If you _____ an interesting day out, ______ the Science Museum.A. want; visitingB. want; visitC. want to; visitD. wanting; visit24. If the pure water is heated to 100 centigrade degrees, it ______ boil.A. is going toB. willC. wouldD. is to25. Is a dictionary available, _____ so, where?A. ifB. if isC. and ifD. and if is二、翻译句子26. 要是我哥哥在这儿，一切都没问题了。

if条件句的使用和搭配

if条件句的使用和搭配【文章标题】：If条件句的使用和搭配【引言】：If条件句是英语中一种常用的句型，通过使用if引导从句，可以表达某种条件下可能发生的情况。

在英语交流中，合理运用if条件句能够在表达观点、提建议或进行假设推理等方面起到关键作用。

本文将深入探讨if条件句的使用方法和搭配，帮助读者更好地理解和运用该句型。

【正文】一、基本形式的if条件句1.1 如果现实情况下可能发生的情况If + 现在时，将来时（主句）如：If it rains tomorrow, I will stay at home.如果明天下雨，我会待在家里。

1.2 与现实相反的假设情况If + 过去时，主句将有would/could/might + 动词原形或could/might + have + 过去分词如：If I were you, I would study harder.如果我是你，我会更加努力学习。

如果他早点起床，他可能赶上火车。

If he had gotten up earlier, he could have caught the train.1.3 对未来的具体假设情况If + 过去将来时，主句将有would/could/might + 动词原形或could/might + have + 过去分词如：If it were to rain tomorrow, I would cancel the outdoor activity. 如果明天要下雨，我会取消户外活动。

如果我赢得了奖学金，我会去留学。

If I were to win the scholarship, I would study abroad.二、混合条件句的使用2.1 表达对过去情况的假设，对现在或将来的影响If + 现在完成时，主句将有would/could/might + 动词原形或could/might + have + 过去分词如：If he had finished his homework earlier, he would not be tired now.如果他早点完成作业，现在他不会那么累。

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If you study hard。

you understand the lesson。

如果你用功研究，你就能理解这节课。

If it rains tomorrow。

we will stay at home。

如果明天下雨，我们会呆在家里。

If you don't hurry。

you will miss the train。

如果你不赶快，你会错过火车。

If I had more money。

I would buy a car。

如果我有更多的钱，我就会买一辆车。

If she had studied harder。

she would have passed the exam。

如果她研究更努力一些，她就能通过考试。

When using if to introduce a nal clause。

it is important to pay n to the tense of the main clause。

The tense used in the main clause should match the intended meaning of the sentence。

Forexample。

if the nal clause is in the present tense。

the main clause can use the future tense。

may/might/can。

must/should。

or present tense.如果你感到累了，你必须休息。

2.If it ___________(rain) tomorrow。

we __________(stay) at home。

如果明天下雨，我们会呆在家里。

3.If you ___________(not finish) your homework。

you__________(not go) out to play.如果你没有完成作业，你不能出去玩。

人教版中考英语语法知识点If+引导的条件句+练习

语法专题：条件状语从句（1）if条件句：有可能性结果发生的行动，在这些句子中，动词的时态是不同的，if 引导的条件状语从句中，主句用一般将来时态，从句用一般现在时态（主将从现）If it doesn’t rain（从句）, we’ll have a picnic tomorrow（主句）.We’ll have a picnic tomorrow, if it doesn’t rain.（if引导的从句可置前可置后）（2）主祈从现（祈使句+if+一般现在时态）Put up your hands if you have any questions to ask. 如果你们有问题问的话，请举手。

当主语是you时，if 引导的条件状语从句可以与”祈使句+and/ or +简单句”进行句型转换。

And 表示句意顺承，or 表示转折，意为”否则”。

Take care , or you will fall off the tree. = If you don’t take care, you’ll fall off the tree. 小心，否则你会从树上掉下来。

（3）主情从现（情态动词+if +一般现在时态）If I get there early, I can see the doctor quickly.（4）句型：will do式be going to do式肯定从句If主语+动词+其他, 主语+will(won’t) do+其他. If主语+动词+其他, 主语+be(be not) going to do+其他.否定从句If主语+be+not+其他, 主语+will(won’t) do+其他. If主语+be+not+其他, 主语+be(be not) going to do+其他.If主语+don't/ doesn't +动词原形+其他, 主语+will(won’t) do+其他. If主语+don't/ doesn't +动词原形+其他, 主语+be(be not) going to do+其他.If the picture is silly, strange and colourful, you will remember it better.If I have time, I am going to visite you .I will go to the park if it doesn’t rain tomorrow . I won't go to the park if it rains tomorrow.专题精讲实战演练题型1：单项选择( ) 1. If the robot ___________ wrong，you can get a new one for free or get all your money back.A. wentB. goesC. would goD. will go ( ) 2. —We’ll go for a picnic if it ___________ on Sunday.—Wish you a lovely weekend.A. rainB. doesn’t rainC. won’t rainD. rains ( ) 3. I’ll do it better if the teacher ___________ me another chance.A. giveB. givesC. gaveD. will give( ) 4. If a polar bear ___________, it ___________ fish from the waterA. will be hungry；catchesB. is hungry；will catchB. is going to be hungry；catches D. is hungry；won’t catch( ) 5. If our government ___________ attention to controlling food safety now, our health ___________ in danger.A. won’t pay; isB. doesn’t pay; isC. won’t pay; will beD. doesn’t pay; will be( ) 6. We will go for a picnic if it___________ tomorrow.A. doesn’t rainB. wasn’t rainyC. won’t rainD. wasn’t raining( ) 7. If the pure water is heated to 100 centigrade degrees, it___________ boil.A. is going toB. willC. wouldD. is to ( ) 8. She will go to America___________ she has much free time and money.A. as long asB. butC. thoughD. although( ) 9. We will go to the West Lake___________ it doesn’t rain heavily tomorrow.A. ifB. unlessC. as long asD. once ( ) 10. I won’t call you, ___________ something unexpected happens.A. unlessB. whetherC. becauseD. While Keys: 1-5 BBBBD 6-10ABAAA题型2：以所给词的正确形式填空1. If he ________ (study) hard, he will get good grades.2. Everyone must wear uniforms. If you don't, they ___________ (let) you in.3. If you stand at the top of the mountain, you _________ (see) the view of the whole city.4. My grandfather will wear a pair of glasses if he__________ (read) newspapers.5. Please turn off the light if you ________ (leave) the classroom.6. We’ll go for a picnic unless it ________(rain) this Sunday.7. Mr Smith ________ (let) you know if he needs help.8. If you walk along the street, you ________ (see) many foreigners.9. If Mary ________ (ask) me for help，I will try my best to help her.10. I don't know if it will snow tomorrow. If it_______ (snow)，we'll make snowmen. Keys:1. Studies 2.won’t let 3. will see 4. reads 5.leave6.doesn’t rain7.will let8.will see9. asks 10.snows直击中考题型1：单项选择( ) 1.—I wonder if your wife ________ to the party.—If your wife _________, so will mine.A. will go, goB. will go, goesC. goes, will goD. will go, will go ( ) 2. If he _________ in half an hour, we _________ wait for him.A. won't come, won'tB. won't come, don'tC. doesn't come, won'tD. will come, don't ( ) 3. I will send you an e-mail as soon as I_________ in Canada.A. arriveB. arrivedC. am arrivingD. will arrive( ) 4. If there ________ no buying and selling of animals, there _________ no killing in nature.A. is; will beB. will be; will beC. is; isD. will be; is ( ) 5. You can’t watch TV ________ you finish your homework.A. beforeB. ifC. whileD. asKeys:1-5:ACAAA。

if真实条件句语法及练习

一．一般现在时1。

1含be动词的一般现在时1.含义：表示一般性，经常性的动作或一般性事实.2.谓语动词的构成:am / is / are3.句型:1). 肯定句：主语＋be动词＋其他.注意: ①句子的第一个单词的首字母大写；②句末加实心点。

2). 否定句:主语＋be动词＋not ＋其他。

注意：①句子的第一个单词的首字母大写；②在be动词后面加not ; ③句末加实心点.3). 一般疑问句：Be动词＋主语＋其他？注意：①把be动词提前; ②句子的第一个单词的首字母大写; ③第一人称改为第二人称;④句末加问号。

肯定回答：Yes, 主语＋be 动词。

否定回答:No，主语＋be 动词＋not.4).特殊疑问句：特殊疑问词＋一般疑问句？1.2含实义动词的一般现在时1.含义：①表示现在的事实或状态②表示现在的习惯或反复的动作2.谓语动词的构成:do/does3.动词的第三人称单数形式的变化形式（动词的适当形式）①一般情况下，直接在动词后面加s。

例：want — wants②以s，x，sh,ch，o结尾的动词，加es。

例：wash — washes ；go — goes；do - does③以辅音字母加y结尾的动词，变y为i再加es. 例：try - tries4.句型：肯定句：主语＋动词原形＋其他。

（主语非三单）主语＋动词的适当形式＋其他。

（主语是三单)否定句: 主语＋do＋not＋动词原形＋其他。

（主语非三单）主语＋does＋not＋动词原形＋其他。

(主语是三单)一般疑问句：Do＋主语＋动词原形＋其他?（主语非三单）肯定回答：Yes，主语＋do. 否定回答:No, 主语+do+not.Does＋主语＋动词原形＋其他?（主语是三单)肯定回答：Yes，主语+does。

否定回答：No，主语＋does＋not。

特殊疑问句：特殊疑问词＋一般疑问句？二、一般将来时2.1 Be going to 句型1.含义:①打算要做某事②准备做某事2.谓语动词的构成:be going to + V原3.句型:①肯定句：主语+ be going to + V原+ 其他.②否定句：主语+ be + not + going to + V原+ 其他。

if可以引导真实条件句和虚拟条件句

if引导的真实语态和虚拟时态一. if 条件句if可以引导真实条件句和虚拟条件句。

真实条件句表示在假设的条件下，能够实现的情况。

在这种情况下，主句和从句的谓语动语随各自的人称和时态发生变化，同时if条件句遵循“主将从现”的原则，即主句用一般将来时，从句用一般现在时表将来。

If it doesn’t rain tomorrow, we will go for a picnic. 如果明天不下雨，我们去野餐。

如果if条件句用来描述说话人认为与事实相反的内容，或仅是一种愿望，假设、猜测等，我们称为虚拟条件句。

If I got rich , I would travel around the world. 如果我有钱了，我将周游全世界。

三、根据句意及括号中的提示完成句子。

1. —I often get nervous when I have an English class. What should I do?—If I were you, I . (ask the English teacher for help)2. —What would the earth be like if there ?(is no air or water on it)—It could be like the moon without any living things.3. If it ,the crops would be saved. (is to rain tomorrow)4. If we had found him earlier, we .(solve the problem more easily)5. If I hadn’t been so busy, I.(take part in the party)四、单选。

( )1. If my father here now, he tell me what to do.A. were, wouldB. were, willC. is wouldD. is will( )2. If I a bee, I work much harder.A. were, wouldB. were, shallC. had, willD. have, should( )3. If I much money, I buy a house.A. have, willB. had, wouldC. had, willD. have, should( )4. He learn more quickly if he harder.A. will, workB. would , workedC. would, workD. will, worked( )5. If I you, I do that.A. was, wouldn’t were, wouldn’t C. am, won’t D. were, won’t( )6. It’s quite impossible that it will rain tomorrow. But if it,I would still go to the park.A. should rainsB. would rainC. rainedD. had rained五、汉泽英1. 如果我是你，我会帮助她。

if条件状语从句讲解与练习

if引导的条件状语从句1) 用法：(1)条件状语从句通常由连词if引导，意为“如果、假如”，主句不能用be going to表示将来，而应该用shall，will。

If you leave now, you are never going to regret it. (错误)If you leave now, you will never regret it. (正确)(2)if “如果”，引导条件状语从句，主句用一般将来时，从句则用一般现在时，如：If it rains tomorrow, I shan’t climb the hills.(3)另外，主句是祈使句或含有情态动词，从句也用一般现在时。

如：Please call me if he comes next Sunday.Can you call the policeman if you are in the trouble.注意宾语从句中的if与条件状语从句if的区别。

宾语从句中的if“是否”相当于whether，引导宾语从句，时态需根据语境确定。

如果主句用一般现在时，从句可以根据具体情况选用时态，如果主句用一般过去时，从句必须用过去式的某种形式。

I don't know if it will rain tomorrow. 我不知道明天是否会下雨。

Our teacher said there was going to be a football match the next month.我们说下月将有场足球比赛。

【边学边做】用括号内所给词的正确形式填空。

1. What will you buy if you ________（have）a lot of money?2. If it __________（not snow）tomorrow, we will feel unhappy.3. You mustn’t go to school if you ________（be）still in bed.4. If he _______（be）at home at that time, he would know it.5. Please show me the way if you ________（know）it.6. You will hurt your teeth if you ________（eat）too much candy.7. If you gave me a toy car, I _________（be）very happy.8. I would get the prize if I _________（work）hard.9．If she ______ (finish ) work early ,she ______(go) home.10．If the weather______（be）fine，we_______(go)for a walk .11. If I_____(have) time tonight ,I _______(finish) the book I’m reading.12. If it ______(rain) next weekend , we_______(not be able to ) plant the vegetable .13. If it_______(rain),we______(stay) at home .14.If she______(arrive) ,she _____(phone) me .15. If he_____(call),tell him I’ll ring back .if 条件状语从句的时态练习一．在正确的答案下划一条线。

if 条件句

8.他们必须决定这样的计划是否能实施，如果可以，什么时候。 They must decide if such a plan can be carried out and if so, when. 9.只有闹钟响了，我才会醒。(倒装) Only if the alarm clock rings do I wake up. 10.当时闹钟响了就好了。 If only the alarm clock had rung.
仿写练习 1.谁来，我都说你不在。(should any visitors come) 2.我有足够时间的话，事情就好办了。(had)
Should any visitors come, I would say you are not in.
Had I enough time, things would be easy.
If you had asked him yesterday, you would know what to do now.
If he hadn’t been warned of the danger last night, he wouldn’t do everything so carefully.
5.就算我们今晚不吃晚饭，至少可以散散步。 (can’t manage dinner) If by any chance we can’t manage dinner tonight, we can at least have a walk. 6.万一你不能按时回去，记得给妈妈打个电话。 (on time) If ever you can’t go home on time, call your mom beforehand. 7.如果今天不行，明天准能得到答复。(get an answer) If not today, I’m sure you’ll get an answer tomorrow.

初中英语语法——If引导的条件状语从句(讲解及练习)

条件状语从句1.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。

If we pay much attention to the earth, we'll have a better world.如果我们多关爱地球，就会拥有一个更美好的世界If it rains tomorrow, what shall we do?如果明天下雨，我们怎么办？注意：if还可以引导虚拟条件句，表示不可实现的条件，从句中多用一般过去时或过去完成时。

What would happen if there were no water ?如果没有水会怎样？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。

条件句表真实，主将从现要遵从；条件句非真实，虚拟语气用到位2.unless引导的条件状语从句unless的意思是“如果不，除非”，可与if...not互换。

You will fail in English unless you work hard.你英语考试会不及格的，除非你更加努力。

3.as /so long as引导的条件状语从句as /so long as意思是“只要”So long as you're happy,I will be happy.只要你高兴，我就高兴。

Ⅰ.单项选择（）1.If you _____ to the party, you’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 go to the library tomorrow if it ___.A. isn’t rainB. rainC. won’t rainD. doesn’t rain（）4. What will you do if you _____ to the old folk’s home?A. goB. wentC. goingD. will go（）5．I’ll give the book to him if he ___ here next Sunday.A. will comeB. comesC. is comingD. cameⅡ.用所给词的适当形式填空6..If you ________(feel) tired, you _______________ (have) to have a rest.7. Where _______ he _________(see) the film if he _____________(have) time?8. If there _________(be) fewer trees, there _____________( be) more pollution.9. If Marcia _______(live) alone, she ___________________( keep) a pet parrot.10. If she __________(get) up late, she _____________( not catch) the early bus.Ⅲ.翻译下列句子11..如果他到的晚了会发生什么事情？What _______ ________ if he __________ late?12. 如果不努力学习，你就不会取得好成绩。

if条件句

if 引导的条件状语从句条件状语从句是在复合句中作条件状语的句子。

表示假如有从句的动作发生就会有主句的动作发生。

条件状语从句常由连词if引导。

(一)连接词ifif如果，是引导条件状语从句的连接词，表示主句中动作发生的条件。

☞If you get up early, you will catch the bus. 如果你早起的话，就能赶上那班公共汽车。

☞You must see the doctor if you are ill. 如果你生病了，就必须去看医生。

(二)if引导的条件状语从句的构成构成方式为＂主句+if引导的条件状语从句＂或＂if引导的条件状语从句+主句＂。

☞I will go to his birthday party if he invites me.=If he invites me, I will go to his birthday party. 如果他邀请我，我会去参加他的生日聚会。

(三)if引导的条件状语从句的时态在一般情况下，如果主句表示将来的意义，从句用一般现在时表将来。

常见的有以下几种：1. 主句谓语中有will, shall, won’t 表示将来时，从句用一般现在时。

☞You will be late for school if you get up late. 如果你起晚了，上学将会迟到。

☞If it rains tomorrow, we won’t go to the Great Wall. 如果明天下雨，我们就不去长城。

2.主句中含有can, may, must等情态动词时，从句用一般现在时。

☞If I finish my homework, I can watch TV. 如果我完成了家庭作业，就可以看电视。

3.主句是祈使句，从句用一般现在时。

☞Don’t forget to lock the door if you are the last one to leave. 如果你最后一个离开，别忘了锁门。

if引导的条件状语从句精讲与专题练习（2）

八年级英语‎：i f引导的‎条件状语从‎句常见的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 finis‎h ed the homew‎o rk，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 would‎invit‎e him to the party‎．如果我是你‎，我会邀请他‎参加聚会。

(不能用wa‎s)I would‎have arriv‎e d much earli‎e r if I had not been caugh‎t in the traff‎i c．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‎一般现在时‎，主句用一般‎将来时If he runs ，he’ll‎get‎there‎in time.如果他用跑‎的，他就会及时‎赶到那儿。

The cat will scrat‎c h 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 thick‎e r the plane‎may/might‎be diver‎t ed.如果雾在大‎一些，飞机可能就‎会改在别的‎机场降落。

if 引导的条件句

if 引导的条件句if引导的条件句表示在某种条件下，会导致另一事发生。

句式为if + 从句，主句。

中文意思是“如果某事发生（或不发生），另一事就（不）发生”。

通常分以下两种情形：一、真实条件句1. if从句和主句都用一般现在时，表示客观真理或习惯和持续发生的事情。

如：If the moon goes near the earth, the tide goes high. 如果月亮离地球距离近，潮水就高。

2. if从句用一般现在时，主句用一般将来时，表示从句中的动作如果发生，那么主句中的动作也将发生。

如：If it stops raining later this afternoon, we will eat out. 如果今天下午晚些时候雨能停，我们就出去吃饭。

3. if从句用一般现在时，主句用祈使句，表示给某人提建议或命令某人做某事，及提出建议或请求。

如：If you are not likely to be in town, please let me know. 如果你不可能在城里，请让我知道。

二、虚拟条件句虚拟条件句，也称非真实条件句，表示在某种假想的条件下，将导致某事发生。

从句中所陈述的事情仅仅只是说话者的想法，不是事实，也不可能发生。

1. if从句用一般过去时（did / were），主句用would / could / should / might + do，表示现在不可能发生的事情，if 从句中所陈述的事情与现在的事实相反。

如：If I were Liu Xiang, I would train hard for the 2008 Olympic Games.如果我是刘翔，我会为了2008年奥运会努力训练。

2. if从句用一般过去时（did / were或were to + do），主句用would / could / should / might + do。

表示将来不可能发生的事情，if 从句中所陈述的事情与将来的事实相反。

if句式的用法

千里之行，始于足下。

if句式的用法if句式是英语中常用的一种条件句句式，其结构为“if + 条件句，主句”。

if句式用来表达假设、条件、可能性等含义。

在下面的文章中，我将具体介绍if句式的用法，并举例说明。

一、表示真实状况的if句式假如if后面的条件句表示的是实际上存在的状况，那么主句中的内容就是对这个存在状况所作出的描述或推断。

例句1：If it rains, we will stay at home.假如下雨，我们就呆在家里。

例句2：If you study hard, you will pass the exam.假如你努力学习，你就会通过考试。

例句3：If she is tired, she goes to bed early.假如她累了，她就早点睡觉。

二、表示假设状况的if句式假如if后面的条件句表示的是一种假设、虚拟的状况，那么主句中的内容通常是对这种假设状况所作出的推断、建议或者标明可能性。

例句1：If I were you, I would apologize to her.假如我是你，我会向她赔礼。

例句2：If you had studied harder, you would have passed the exam.假如你更努力学习了，你本可以通过考试的。

第1页/共3页锲而不舍，金石可镂。

例句3：If it doesn't rain tomorrow, we will have a picnic.假如明天不下雨，我们就去野餐。

三、表示习惯、规章的if句式if句式还可以用来表达习惯、规章、定理等。

例句1：If you heat water to 100 degrees Celsius, it boils.假如你将水加热到100摄氏度，它就会沸腾。

例句2：If it is Sunday, I always go shopping.假如是星期天，我总是去购物。

例句3：If you touch fire, you will get burned.假如你触碰火，你会被烧伤。

if条件句讲解及练习

if 引导的条件句

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)

条件副词练习

if引导的条件句是什么从句