初中英语语法——If引导的条件状语从句(讲解及练习).
(完整版)if引导的条件状语从句练习题

if引导的条件状语从句引导条件状语从句最常用的连词是if,常见的if条件状语从句表示在某条件下,某事很可能发生,条件是可能存在的,主句中某种情况发生的概率也是很高的。
如:If you ask him,he will help you.如果你请他帮忙,他会帮你的。
If you fail in the exam,you will let him down.如果你考试不及格,你会让他失望的。
If you have finished the homework,you can go home.如果你作业做完了就可以回家了。
另外,if从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设。
从句多用一般过去时或过去完成时,表示对现在或过去的一种假设。
如:If I were you,I would invite him to the party.如果我是你,我会邀请他参加聚会。
I would have arrived much earlier if I had not been caught in the traffic.要不是交通堵塞,我本会来得早一些。
另外你还要注意if 条件句的时态搭配1.if从句用一般现在时,主句用一般将来时If he runs he’ll get there in time. 如果他用跑的,他就会及时赶到那儿。
The cat will scratch you if you pull her tail. 如果你拉猫的尾巴,它就会抓你。
2.if从句用一般现在时,主句用may/might/canIf the fog gets thicker the plane may/might be diverted. 如果雾在大一些,飞机可能就会改在别的机场降落。
If it stops snowing we can go out. 如果雪停了,我们就可以出去。
3.if从句用一般现在时,主句用must/shouldIf you want to lose weight you must/should eat less bread. 如果你想减肥,你必须少吃面包。
If引导条件状语从句的详细用法解答

I(一)f引导条件状语从句的详细用法解答引导条件状语从句最常用的连词是if,常见的if条件状语从句表示在某条件下,某事很可能发生,条件是可能存在的,主句中某种情况发生的概率也是很高的。
如:If you ask him,he will help you.如果你请他帮忙,他会帮你的。
If you fail in the exam,you will let him down.如果你考试不及格,你会让他失望的。
If you have finished the homework, you can go home.如果你作业做完了就可以回家了。
另外,if从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设。
从句多用一般过去时或过去完成时,表示对现在或过去的一种假设。
如:If I were you,I would invite him to the party.如果我是你,我会邀请他参加聚会。
I would have arrived much earlier if I had not been caught in the traffic.要不是交通堵塞,我本会来得早一些。
另外你还要注意if 条件句的时态搭配1.if从句用一般现在时,主句用一般将来时If he runs he’ll get there in time. 如果他用跑的,他就会及时赶到那儿。
The cat will scratch you if you pull her tail. 如果你拉猫的尾巴,它就会抓你。
2.if从句用一般现在时,主句用may/might/canIf the fog gets thicker the plane may/might be diverted. 如果雾在大一些,飞机可能就会改在别的机场降落。
If it stops snowing we can go out. 如果雪停了,我们就可以出去。
3.if从句用一般现在时,主句用must/shouldIf you want to lose weight you must/should eat less bread. 如果你想减肥,你必须少吃面包。
(完整word版)初中英语If引导条件状语从句

初中英―― if 引的条件状从句在 if 引的条件状从句中, if 和条件句地点灵巧,可直接放在主句后边,若 if 条件句放句首,从句后边要加逗号,和主句分开。
要注意前后一致原 .引条件状从句的接主要有: if( 假如)、unless(除非)或 as long as(只需)等。
unless在乎思上等于 if...not。
一、条件状从句用法1、引条件状从句最常用的是if, 由 if 引的条件状从句表示在某种条件下某事很可能生。
如:If you ask him, he will help you.假如你他帮忙 ,他会帮你的。
If you fail in the exam, you will let him down.假如你考不及格 ,你会他绝望的。
此外 ,if 从句表示不行的条件或根本不行能存在的条件 ,也就是一种虚的条件或假 ,从句多用一般去或去达成。
如 :If I were you, I would invite him to the party.假如我是你 ,我会邀他参加聚会。
2、 unless = if...not. 除非 ,若不 ,除非在⋯⋯的候比如:Let's go out for a walk unless you are too tired.=If you are not too tired, let's go out for a walk.Unless it rains, the game will be played.除非下雨 ,比将照旧行。
二、在条件状从句中,要注意“主将从”的定,即主句用一般未来,从句用一般在表示未来。
例句:I will come to see you if I have time.我有,我就来看你。
三假如 if 条件句的是重复生和示要生的情形和事件,主从句大多用一般在。
如:If bears are in danger ,they attack people.区提示if 既能够引条件状从句,表示“假如”,也能够引从句,表达“是否”。
初中英语语法-If引导的条件状语从句(讲解及练习)

初中英语语法-If引导的条件状语从句(讲解及练习)Ⅰ条件状语从句的定义Ⅱ条件状语从句的引导词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。
Ifwepaymuchattentiontotheearth,we'llhaveabetterworld.如果我们多关爱地球,就会拥有一个更美好的世界Ifitraintomorrow,whathallwedo 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。
Whatwouldhappeniftherewerenowater 如果没有水会怎样?2.unle引导的条件状语从句,unle的意思是如果不,除非。
可与if...not互换。
YouwillfailinEnglihunleyouworkhard.你英语考试会不及格的,除非你更加努力。
3.a/olonga引导的条件状语从句:a/olonga意思是“只要”Solongayou'rehappy,iwillbehappy.只要你高兴,我就高兴。
Ⅲ条件状语从句的种类Ⅳ条件状语从句的时态原则条件句真实从句一般现在时一般过去时be动词用(were)用法①主句为一般将来时态,if从句用一般现在时态(即主将从现)。
②主句中含有情态动词,if从句用一般现在时态。
主句一般将来时情态动词+动原祈使句would/could+动原例句非真实Wewilltayathomeifitraintomorrow.如果明天下雨,我将要呆在家。
Ifyoufinihyourhomework,youcangohomenow.如果你做完了作业,你现在可以回家了。
③主句为祈使句,if从句用一般现在时态。
Don’tjumpintotheriverifyoufeelveryhot.如果你感到很热,不要跳入河里。
④主句为过去将来时,if从句用一般过去时态(如果涉及到be动词,一律都用were)。
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。
初二英语状语从句中if引导的条件状语从句解析

初二英语状语从句中if引导的条件状语从句解析【考纲解读】1.掌握各种条件状语从句,如本文中的if引导的条件状语从句。
2. 正确使用各种状语及其时态。
3. 掌握条件状语中“主将从现”的用法。
【知识点梳理】引导条件状语从句最常用的连词是if,常见的if条件状语从句表示在某条件下,某事很可能发生,条件是可能存在的,主句中某种情况发生的概率也是很高的。
如:If you ask him,he will help you.如果你请他帮忙,他会帮你的。
If you fail in the exam,you will let him down.如果你考试不及格,你会让他失望的。
If you have finished the homework, you can go home.如果你作业做完了就可以回家了。
另外,if从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设。
从句多用一般过去时或过去完成时,表示对现在或过去的一种假设。
如:If I were you,I would invite him to the party.如果我是你,我会邀请他参加聚会。
I would have arrived much earlier if I had not been caught in the traffic.要不是交通堵塞,我本会来得早一些。
另外你还要注意if 条件句的时态搭配1.if从句用一般现在时,主句用一般将来时If he runs he’ll get there in time. 如果他用跑的,他就会及时赶到那儿。
The cat will scratch you if you pull her tail. 如果你拉猫的尾巴,它就会抓你。
2.if从句用一般现在时,主句用may/might/canIf the fog gets thicker the plane may/might be diverted. 如果雾在大一些,飞机可能就会改在别的机场降落。
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。
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初中英语――条件状语从句(讲解&练习)
Ⅰ条件状语从句的定义
Ⅱ条件状语从句的引导词
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?
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。
Ⅲ条件状语从句的种类
Ⅳ条件状语从句的时态原则
注意:
学习" if " 引导的条件状语从句的用法,现在总结一下:
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。
练习
Ⅰ.单项选择
()1.If you _____ to the part y, you’ll have a great time.
A. will go
B. went
C. go
D. going
()2. I ____ her the answer if she ____me.
A. can tell, will ask
B. will tell, will ask
C. would tell, ask
D. will tell, asks
()3. – What are you going to do tomorrow?
--We’ll go to the library tomorrow if it ___.
A. isn’t rain
B. rain
C. won’t rain
D. doesn’t rain
()4. What will you do if you _____ to the old folk’s home?
A. go
B. went
C. going
D. will go
()5.I’ll give the book to him if he ___ here next Sunday.
A. will come
B. comes
C. is coming
D. came
Ⅱ.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. 11. Lana ________________( buy) a new dress if the old one ____________(be) out of style.
12.The twins ______________(fight) if they_______________(argue).
13. I ____________(have) a bake sale if I _____________(need) money for education.
14. Peter _____________( send) me a beautiful souvenir if he ________________(tour) Spain.
15. I ____________(go) to the beach if it________________ ( not rain) this week.
17. __________they __________( have) a match if the P.E. teacher _____________(be) busy?
18. If she ____________(get) up late, she _____________ ( not catch) the early bus.
Ⅲ.翻译下列句子
19..如果他到的晚了会发生什么事情?
What _______________ if he _____________ late?
20. 如果努力学习,你就会取得好成绩。
If you__________ _________, you good marks.
21. 他如果看电视太久了,他的父母会不高兴。
If he _________ TV too much, his parents __________ __________ unhappy.
22. 如果我们为他组织生日聚会,大家都会来的。
Everyone ________________ if we _____________ a birthday party __________ him. 23. 如果明天不下雨,我会和你一起去公园的。
If it __________ __________ tomorrow, I ______________ go to the park _________ you.
24. 如果她睡过头了,就会旅游迟到的。
She;__________________________ the trip if she ___________________.
25. 如果他有空,他会帮助你的。
If he _________________, he _________________ you.
26. 如果Tom考试不及格,他就没有机会上高中了。
Tom _________have the ________to go to the ________high school if he ________ the exams.。