初中英语语法——If引导的条件状语从句(讲解及练习)(汇编)

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if条件状语从句语法

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当句末为or not时，引导词只能用whether而不能用if.
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If 与whether 区分
1. I don’t know _____ he will come or not. 与or not 连用只能用whether
2. I don’t care of ______ he is handsome. 介词后只能用whether
3 If she__w__in_s___ (win) the prize ,we _w_i_ll_b__e_(be) happy. 4.If I __d_o_n_’__t _e_at (not,eat )so much ,I _w__il_l _g_e_t__(get) thinner.
5.If you __te_l_l __(tell) them, they __w_o_n_’__t__b_e_li_e_ve(not,believe) you. 6 I __w_i_ll_s_t_a_y_(stay) at home,If it ___ra_i_n_s____( rain). 7.If it _d__o_e_s_n_’__t ___(not,rain) ,I __w__il_l _g_o__( go) out.
5. 以下从句中will不是未来时助动词，而是情态动词。翻译为“愿意”。
If you will excuse me,I really must go to bed . 假如你能原谅我话，我真要睡觉了。
If you will wait a minute ,I’ll go and tell my mother that you are here .
If you are free this weekend, what will you do ?

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 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(2010重庆中考)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。

If引导的条件状语从句讲解与练习.doc

If引导的条件状语从句讲解与练习If引导条件状语从句的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。

女口：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。

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/can/must/shouldIf it stops snowing we can go out如果雪停了，我们就可以出去。

If you want to lose weight you must/should eat less bread ・如果你想减肥，你必须少吃面包。

（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。

女口：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。

）If条件状语从句练习( )1. If I find his phone number, I _____ you.A. tellB. toldC. will tellD. have told()2. I __ the CDs to you if I have time tomorrow.A. will returnB. returnedC. have returnedD. return( )3. The students will go to the Summer Palace if it _______ tomorrow.A. won' t rainB. isn' t rainingC. doesn' t rainD. isn' t rain( )4. I won ' t watch the TV play if myhar ___ me do my homework.A. letB. will letC. won' t letD. lets()5. If you ____ q uiet, I ' ll tell you what happened.A. willB. are C are to be D be()6. If you go to the party, you ____ a good time.A. would haveB. haveC. will haveD. had( )7. Don ' t worry. Peter will call you as soon as he _____ London.A. will get toB. gets toC. get toD. got to( )8.He doesn ' t tell me when he __.I ' ll telephone you as soon as heA. will come, comesB. will come, will comeC. comes, will comeD. comes, comes()9.-- I don ' t know if Dr. White _______ to the party next week.--I think he will come if he ______ free.A. comes; will comeB. will come; will beC. comes; isD. will come; is( )10. I don' know if there ______ a sports meeting next month .If they____ i t, I must get ready for it.A. is; will holdB. will be; holdC. will be; will holdD. will have; holdA. what does he like bestB. what he like bestC. what he does like bestD. what he likes best ()2. Can you tell me ______________________ ?宾语从句练习()1. I don ' t know ______________A. where she lives B・ where does she liveC. she lives whereD. where she live( )3. He asked me _______________________________ .A. what time is itB. what time it isC. what time was itD. what time it was ()4. Do you know ?A. how much did it costB. how much it did costC. how much it costsD. how much does it cost( )5. The man asked her _______________________ .A. why did she do itB. why she did itC. why she doesD. why does she do it( )6. Nobody knows _________________________ .A. when will she come backB. when she come backC. when she will come backD. when does she come back ( )7. Mum asked ___________________________________________ .A. where he wasB. where was heC. where he isD. where is he( )8. Do you know _______________________________ ?A. what they are looking forB. what are they looking forC, they are looking for what D. what do they look for ()9. The teacher asked __________________________________________________ .A. who can answer this questionB. who could answer the questionC. what question did she askD. she answered this question( )10. I asked her _______________________________ .A. whether he has been to AustraliaB. whether has he been to AustraliaC. whether he had been to AustraliaD. whether he goes to Australia( )11. The teacher told us _________________________________ .A. that light traveled faster than soundB. if light traveled faster than sound ・C. that light travels faster than soundD. if light travels faster than sound( )12. He said that __________________________________ .A. he is doing his homeworkB. he does his homeworkC. he was doing his homeworkD. he do his homework( )13. I asked him _________________________ .A. where did he goB. where he wentC. where does he goD. where he did go( )14. --Excuse me, could you tell me _____ get to the plane?--Certainl y. Go straight alone here.A. how can weB. how we canC. when can weD. when we can( )15. Do you know _____ he will ride here at 8 tomorrow morning?A. whenB. whereC. whetherD. how( )16. --Can you tell me why __________________ ?--Because I want to help the people there.A. do you go to TibetB. did you go to TibetC. are you going to TibetD. you are going to Tibet( )17. Do you know _______________________________ ?A. what time does the train leaveB. what time leaves the trainC. what time the train leaveD. what time the train leaves( )18. Could you tell me _______________________ ?A. who is heB. where ' s the nearest restaurantC. if he will come tomorrowD. which way is to the underground station( )19 ・--Do you know _________ ?--Sorry・ I don ' t know・ You may ask the woman over there. A.when the shop opens B. when is the shop openC. when does the shop openD. when will the shop open( )20 --Dad, do you know ____________ ? --In half an hour.A. when will the football game startB when the football game will startC. when is the football game going to startD. when shall we start the football game( )21. Could you tell me _______________________ ?A. which bus they are waiting forB. which bus are they waiting forC. they ' re waiting for which busD. which bus they wait( )22. I asked her __________________________ .A. whether did she like the red oneB. whether she likes the red oneC. whether does she like the red oneD. whether she liked the red one( )23. Can you guess 猜) ___________ the people in the picture are ?A. whenB. whomC. whoseD. who( )24. I ' m thinking about _________________________________ .A. if I ' ll help heB. whether I ' ll help herC. what I ' ll help herD. that I help her( )25. --We never know ______________ . --They say he is a teacher.A. what the old man isB. what is the old manC. who is the old manD. which the old man is汪树峰蔡英凯学生缴费日期表。

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。

2023年中考英语语法专题讲解之If条件从句总结及练习

(go) to Changsha yesterday.
if/whether引导的宾语从句，
从句与主句的时态保持一致；即主句一般现在时，从句用任意时态；主句过去时，从句用与过去的某一种时态
我想知道他是否是对的。 I wonder whether he is right or not. =I wonder if he is right.
4. Don’t leave until he _B__ back. A have come B comes C will come 5 －Tell him about the news when he __A__ , John. － Yes, I will. A comes B will come C is coming
shopping or tidy the room.
4.宾语从句提前时：
Whether this is true or not, I can’t say.
5.在动词discuss后的宾语从句中:
We discussed whether we would have a sports meeting next week.
2. I will go swimming with you if I
_C__ free tomorrow.
A will be B was C am
3. If you _C__ a chance to study in a
foreign country, just take it .
A getting B will get C get
用if不用whether的情况:
1.引导否定概念的宾语从句时：
He asked me if I hadn’t finished my homework.

if引导的条件状语从句总结（精）

if引导的条件状语从句总结（精）第一篇：if引导的条件状语从句总结(精)解码if 引导的条件状语从句[课本链接] If you do, you’ll be sorry.(Unit 5, Section A [一语击破 ] if 引导的条件状语从句表示假如从句的动作发生,主句的动作就(不会发生。

[解码句子结构 ] 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。

放在句首时,从句后面要用逗号和主句隔开。

如: I’ll go to see you if I have time.如果有时间,我就去看你。

If it rains tomorrow, we’ ll stay at home.如果明天下雨,我们就呆在家里。

[解码时态呼应 ] 在复合句中:⑴ 当主句是一般现在时或是一般将来时时;(2当主句是祈使句时;(3当主句含有情态动词时, if 引导的条件状语从句通常用一般现在时。

如: If she doesn’t come, she will be sorry.如果她不来,她会遗憾的。

Have a good rest if you are tired.如果累了,你就好好休息一下。

We must study hard if we want to pass the final exam.如果想通过期末考试,我们必须努力学习。

[解码同义句转换] 1.用“ 祈使句+and / or +一般将来时的句子” 转换。

如: If you work hard, you’ll pass the exam easily.→ Work hard, and you’ll pass the exam easily.努力学习, 你将很容易通过考试。

If you don’t hurry up, you’ll miss the train.→ Hurry up, oryou’ll miss the train.快点儿,否则你就赶不上火车了。

初中英语——If引导的条件状语从句(整理版)说课讲解

在句子中做条件状语的从句称为条件状语从句。

引导条件状语从句的连接词有：if ,unless,as/so long as，once等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.如果没有水会怎样？2.unless引导的条件状语从句You will fail in English unless you work hard.3.as /so long as引导的条件状语从句So long as you're happy,i will be happy.4.once引导的条件状语从句Once you begin,never stop.提示：在条件状语从句中，用一般现在时代替一般将来时，用一般过去时代替过去将来时。

Father told me if i worked hard he would buy me a gift.if 条件状语从句的时态练习二、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 _____________(dress) more casually if he ________________( not work) on weekends.5. If Marcia _____________(live) alone, she ___________________( keep) a pet parrot.6. Lana ________________( buy) a new dress if the old one ____________(be) out of style.7.The twins ______________(fight) if they_______________(argue).8. I ____________(have) a bake sale if I _____________(need) money for education.9. Peter _____________( send) me a beautiful souvenir if he ________________(tour) Spain.10. If Mr Green ___________(say) I am hard- working, my parents _________( feel) glad.11.I ____________(go) to the beach if it________________ ( not rain) this week.12. __________they __________( have) a match if the P.E. teacher _____________(be) busy?13.He ____(write) a letter to his grandparents if he ____(get) his report card this week.14. If she ____________(get) up late, she _____________ ( not catch) the early bus.15. Peter ________(major) in English if he ____(pass) the exams in Peking University.15.如果他到的晚了会发生什么事情？What _______________ if he _____________ late?16. 如果努力学习，你就会取得好成绩。

Module5-Module6if引导条件状语从句讲解及练习九年级英语上册

If引导的条件状语从句的讲解与练习一、if从句的位置if引导的从句可以放在主句之前，也可以放在主句之后。

Eg: If you do not feel well, go to see the doctor.Go to see the doctor if you do not feel well.二、if从句的类型：1.if从句+祈使句(表建议: 如果......就......)主祈从现Eg: If you want to go to the cinema, call me.2.if从句，主语+will(not) +V.(动词原形)主将从现Eg: If you start now, you'll finish it before dinner.If it is sunny tomorrow, we will go for a picnic.3.if从句，主语+may(might)/could+V.(动词原形)主情从现Eg: If you work hard, you might not make so many mistakes.即学即练一、单项选择。

1.If you _____ to the party, you’ll have a great timeA. will goB. wentC. go2. I ____ her the answer if she ____me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell, asks3 – What are you going to do tomorrow? —We’ll go to the library tomorrowif it ___.A.isn’t rainB. rainC. won’t rainD. doesn’t rain4. What will you do if you _____ to the old folk’s home visit?A. goB. went D. will go5. If I eat ____ food, I’ll be very fat.A. too manyB. many tooC. too muchD. much too6. I’ll give the book to him if he ___ here next Sunday.A. will eB. esC. is ingD. Came7. Our world will get better and better each of us lives a greener life.A. beforeB. ifC. thoughD. until8. If he ________hard, he will get good gradesA. studyB. studiesC. will studyD. studied9. I want to know if Mary________ to the party tomorrow.A. goB. wentC. will goD. goes10. Everyone must dress up. If you_______ ,they won’t let you in.A. don’tB. won’tC. can’tD. mus tn’t11. Johnson won't answer the phone if he _______ the number.A. knewB. doesn't knowC. will knowD. didn’t know12. If Nancy_____the exam, she will go to Australia for English study.A. passB. passedC. passesD.will pass13. There will be less pollution more people use publictransportation.A.butB.thoughC.unlessD. if二、用所给词的适当形式填空。

if用法详解(含练习和答案)

if用法详解(含练习和答案)If的用法一、if作为连词，引导条件状语从句，表示“假如”“如果”等。

在复合句中，如果主句使用将来时，则if引导的状语从句使用一般现在时。

例如：1.如果天不下雨，下周星期天我们将去公园。

2.如果你请求他，他将会帮助你。

二、if还可以引导让步状语从句。

这时if相当于“即使是”，“虽说”。

例如：1.虽然她很穷，但至少她还是诚实的。

2.即使我错了，那么你也不对。

3.虽然会花费我一下午的时间，我还是要做这件事。

三、if作为连词还可以引导宾语从句。

引导宾语从句时和whether意思相同。

例如：1.XXX问她是否喜欢它。

2.她问他们是否有一件棉织的。

四、用于虚拟语气中，if从句中使用过去式，表示不可能实现、大概不会实现或提出作为考虑的假定条件。

例如：1.假使你是只鸟，你便会飞了。

2.如果我向他借贷，他会答应吗？另外，if从句中使用过去完成式，表示过去未实现的条件（例如由于不可能实现或某人未能实行）。

例如：1.要是他们早些动身，他们便可及时到达了。

2.如果他们那时不动身，现在他们就不会在此地了。

人一样。

2.As if by magic，the XXX.)花儿一夜之间就像魔法一样开了。

其次，unless与if连用，表示“除非”的意思。

例如：1.Unless you work hard，you won’t succeed．(If you don’t work hard。

you won’t succeed.)除非你努力工作，否则你不会成功。

2.I won’t go unless you come with me．(If you don’t com e with me。

I won’t go.)除非你和我一起去，否则我不会去。

最后，suppose与if连用，表示“假设、设想”的意思。

例如：1.Suppose it rains tomorrow，what will you do。

(If it rains tomorrow。

中考初中英语 if条件句讲解及练习

中考初中英语if条件句讲解及练习【知识要点】定义：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。

E.g. If you ask him，he will help you．如果你请他帮忙，他会帮你的。

E.g. 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。

E.g. 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。

E.g.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。

E.g.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从句用一般现在时，主句用一般将来时E.g. If he runs he’ll get there in time.如果他用跑的，他就会及时赶到那儿。

E.g. 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/canE.g. If 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。

E.g. If it stops snowing we can go out.如果雪停了，我们就可以出去。

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.yo.____.t.th.party.you’l.hav..grea.time.a.wil.go.b.went.c.go .d.going2.I.wil.b..lon.tim.___.pete.____.hi.work.a.since.ha.finished .b.after.finishesc.when.wil.finish .d.before.finishes.3.wha.wil.fathe.____.u.fro.Japan.a.take .b.bring .c.carry .d.mak.4.Weifan.i.famou._____.kitesa.for .b.to .c.on .d.with5.I___.he.th.answe.i.sh.____me.a.ca.tell.wil.ask .b.wil.tell.wil.ask.c.woul.tell.ask .d.wil.tell.asks6..wha.ar.yo.goin.t.d.tomorrow?--we’l.g.t.th.librar.tomorro.i.i.___.a.isn’.rain.b.rain .c.won’.rain.d.doesn’.rain7.—Do you know when he will come back tomorrow?--sorry..don’.know.whe.h.___.back.I’l.tel.you.es.e .e ..8.wha.wil.yo.d.i.yo.____.t.th.ol.folk’.hom.visit?a.go .b.went .c.going .d.wil.go9.I..ea.___.food.I’l.b.ver.fat.a.to.many .b.man.too .c.to.much.d.muc.too10.I’ll give the book to him if he ___ here next sunday.e .es .ing .d.came11.Ther.____a.englis.fil.i.ou.schoo.tomorrow.a.i.goin.t.have.b.wil.have .c.i.goin.t.be .d.has12.Could you tell us where ____？a.wil.th.nex.olympi.game.held.b.th.nex.olympi.game.wil.b.heldc.woul.th.nex.olympi.game.b.hel.d.th.nex.olympi.game.woul.b.helds.night,.____..book.a.read .b.a.reading .c.wa.reading.d.a.goin.t.read14.Wha.___.yo.___.whe.i.bega.t.rain?a.do.d..b.were.doing.c.are.doing.d.did.do15.I’l.wak.yo.u.whe.h.____back.a.will .e .e.eII、用所给词的适当形式填空1.I.yo._______(feel.tired.yo.______(have.t.hav..rest.2.Wher.____.h. ______(see.th.fil.i.h.________(have.time?3.I.ther.___.(be.fewe.trees.ther.______.(be.mor.pollution.4.H.____.(dress) mor.casuall.i.h.______.(no.work.o.weekends.5.If marcia _______ (live) alone, she _______ (keep) a pet parrot.n.____.(buy..ne.dres.i.th.ol.on.___.(be.ou.o.style.7.Th.twin.____.(fight.i.they_________.(argue).8.I_____.(have..bak.sal.i.I___.(cation.9.Pete.___.(send.m..beautifu.souveni.i.h.____(tour.spain.10.I.mr.gree.______.(say..a.hard.working.m.parent.____.(feel.glad.11.I_____.(go.t.th.beac.i.it_______.(no.rain.thi.week.12.____the._____.(have..matc.i.th.p.e.teache.______.(be.busy?13.H.______.(write..lette.t.hi.grandparent.i.h._____.(get.hi.repor.car.thi.week.14.I.sh._____.(te.sh.____.(no.catch.th.earl.bus.15.Pete.________.(major.i.Englis.i.h._______(pass.th.exam.i.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(讲义及答案)

if 引导的条件状语从句（讲义）状语用来表示行为发生的时间、地点、目的、方式、程度等，通常由副词或介词短语充当，也可由一个句子充当。

I slept at home yesterday because I had a bad cold.状语从句状语从句指句子作状语。

根据其作用可分为时间、地点、原因、条件、目的、结果、让步、方式等从句。

状语从句一般由连词(从属连词)引导。

I will go to school by bike tomorrow if it is sunny.Grammar focus—I think I’ll take the bus to the party.—If you do, you’ll be late.If you take the bus to the party, you’ll be late.—I think I’ll stay at home.—If you do, you’ll be sorry.If you stay at home, you’ll be sorry.—What will happen if they have the party today?—If they have it today, half the class won’t come.—Should we ask people to bring food?—If we ask people to bring food, they’ll just bring potato chipsand chocolate.1.if 在本单元句中意为“；”，用于引导即 if 引导的是一个完整的句子，所以一定要有主谓，成为从句，另一个句子则成为主句。

If you go there, I’ll go, too.We will go hiking if it doesn’t rain tomorrow.If Bob leaves tomorrow, I will hold a party for him tonight.2.if 引导的条件状语从句既可以放在主句前，也可放在主句后。

If+引导的条件状语从句+学案

if引导的条件状语从句的用法及练习带答案用法例句常考考点：（主将从现）主句为一般将来时，if引导的从句用一般现在时If it rains tomorrow, I won’t climb the hills.如果明天下雨，我就不爬山。

If you finish your homework, you can watch TV.如果你完成了家庭作业，你可以看电视。

（主情从现）主句中含有情态动词，if引导的从句用一般现在时If you finish your homework on time，you can watch TV for 2hours.如果你暗示完成作业，你就能看两小时的电视。

（主祈从现）主句为祈使句时，if引导的从句用一般现在时If you want to get up early，don't stay up late.如果你想要早起，就不要熬夜。

If you feel cold，don't open the window.如果你感到冷，就不要打开窗户。

（主过从过）主句的时态是过去的某种时态时，if从句也要用过去的某种时态；Lucy asked Tom if he was afraid of dogs. If I were you，I wouldn't do it like that.if做是否讲引导宾语从句时，语境该用什么时态就用什么时态：I don’t know if it will rain tomorrow.我不知道明天是否会下雨。

1、借助“祈使句+and (or)+一般将来时的句子”这一句型来转换。

and在句意上表示顺承关系，or表示转折关系。

如：If you get up early,you’ll get there on time. if+that，sb will do sthGet up early, and you’ll get there on time. 祈使句，and sb will do sthGet up early, or you won’t get there on time. 祈使句，or sb won't do sth2、If引导的条件状语从句可以转化为介词短语with/without 结构I can't pass the exam if you don't help me.（同否即否）I can't pass the exam without your help.l can pass the exam if you help me（同肯即肯）I can pass the exam with your help3、unless引导的条件状语从句，表示强烈否定，译为“除非，非.....不可，”unless 从句的谓语只能用肯定形式，unless=if...not.I can't pass the exam if you don't help me.（前否后否）I can't pas the exam unless you help me4 、if与as/so long as 引导的条件状语从句,“只要”,“如果”，You will pass the exam as long as /if you work hard.课堂小练：( )1.You can improve your spoken English you practice it every day from now on.A. ifB. unlessC.althoughD. until( )2.My father was preparing for his lesson__my mother was doing some washing last night.A. ifB. whileC.unlessD. until( )3.You should get up earlier you want to catch the early busA. thoughB. beforeC.ifD. unless( )4. We'll go hiking if it tomorrowA. won't rainB. didn't rainC. doesn't rainD. isn't raining( )5.lf you to the party, you'll have a great timeA. will goB.wentC.goD.going( ) 6. I her the answer if she me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell, ask( ) 7.What will you do if you to the old folk's home visit?A.goB.went.C.goingD.will go( ) 8. Vivian will take her daughter to the amusement park _____she gets the tickets.A. ifB. untilC. althoughD. unless( )9. We are not allowed to enter any public places, _____ we have a normal temperature and a health code.A. ifB. unlessC. thoughD. since( )10. _____ it is raining outside, we’d better have some indoor activities, such as watching TV and doing housework.A. IfB. BeforeC. UntilD. Since( ) 11.Stop cutting trees,the earth will become worse and worse.A.andB.thenC.butD.or( ) 12.Never give up,_____you’ll make it.A.andB.butC.orD.yet( )13.Help others whenever you can you'll make theworld a nicer place to live in.A.orB.andC.butD.though( )14.Simon his grandparents if he free.A. will visit, will beB. visits, will beC. will visit. isD.visits, is( )15.They their teacher for help if they problems.A. will ask, will haveB.will ask, haveC.ask, will haveD.ask,have( )16.If you to visit the zoo, you a lot of interesting animals.A.will go, will seeB.go, will seeC. will go, seeD.go,see( )17. Mike a top student in his class if he hard.A. will be, will workB. is, worksC.will be, worksD.is, will work( )18.If we more bamboo, pandas more foodA.will grow, will haveB.grow, will haveC.will grow, haveD.grow,have( )19.If there a baby tiger, tigers as a familyA. will be, will liveB. is, will liveC.is, liveD.will be, live( )20.If people wild animals,they out.A.won’t protect, will dieB.don’t protect, will dieC.won’t protect, dieD.don't protect, die( )21.I don’t know if you . If you , please call me tonight.A.will come, will comeB. comes, comesC. comes, will comeD.will come, come( )22.I am not sure if you in the exam, but you'll be better if you harder.A.succeed; workB. succeed: will workC. will succeed; workD.will succeed, will work( )23.I don't know if it You’ll get wet if it .You’d better take an umbrella.A. will rain, will rainB. rains, will rainC. will rain, rainsD. will rains, will rains( )24.I'm waiting for my friend. , I'll go shopping alone.A. If she comesB. If she will comeC. If she doesn't comeD. If she didn't come( )25. we don't save water, we will have no water to drink one day.A. WhereB. WhenC.AlthoughD. If( )26. We will go for a picnic if it tomorrow.A. doesn't rainB. wasn’t rainC. won't rainD. wasn't raining( )27.Don’t speak loudly the party. If you do, you'll leave.A.at; mustB. of; have toC.at: have toD.in:must( )28.-Do you know if we will go for a picnic this Saturday?- I think we will if we any classesA.won't haveB. didn't haveC. don't haveD. aren't having( )29.I the CDs to you if I have time tomorrow.A.will returnB.returnedC.have returnedD.return( )30.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.have: rains( )31 .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( )32.If it sunny tomorrow, I fishing in South Lake.A.is; goB.will be; goC.is; will goD.will be, will( )33.---Could we go and watch the football game? ---No,__you have the tickets.A.ifB.unlessC.becauseD.since( )34.Where will you go if you next weekend?A.will freeB.are freeC.were freeD.can free( )35.If there no buying and selling of animals, thereno killing in nature.A. is;will beB.will be; will beC.is; isD.will be; is( )36.You’ll do much better you’re more careful with your spellingA.ifB.untilC.unlessD.though参考答案1-5：ABCCC 6-10：DAABA 11-15：DABCB 16-20：BCBBB 21-25：DCCCD 26-30:ACCAC 31-35:DCBBA 36:A。