初中英语If引导的条件状语从句
if 引导的条件状语从句
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一般现在时。 If you drive too fast, you may have an accident. You must stop if the traffic is red. If you finish the homework, you can go home. 如果你作业做完了就可以回家了。 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。
if引导的条件状语从句
If条件句:条件句用于陈述语气,表示将来的可能性,能力, 允
诺,命令,要求,请求,建议时,假设的情况可能发生,其中 if 是“假如, 如果”的意思。主句一般将来时 ,从句用一般现在时。
运用“主将从现”的原则。
构 成
条件从句
主句
时 态
If+一般现在时 主语+shall/will+动词原形
if引导的条件状语从句
主从句的时态?
If I get up late, I will be late for school. If I don’t finish my homework, I won’t go to bed. If you join the band(乐队), you will be famous.
• 除非天气不好,我每天早晨都要去散步。
• 3. I won‘t loan you unless you are in extreme need of money.
• 若不是你急需用钱,我不会借钱给你的。
if引导的条件状语从句
Summary(小结)
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。 条件句表可能, 主将从现不一般; 条件句表事实, 主句常用现在时。
初中英语——If引导的条件状语从句
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初中英语――if引导的条件状语从句在主从复合句中修饰主句中的动词、形容词、副词等的从句叫做状语从句,状语从句一般可分为时间状语从句、地点状语从句、原因状语从句、目的状语从句、结果状语从句、条件状语从句、让步状语从句、比较状语从句和方式状语从句九种。
在句子中做条件状语的从句称为条件状语从句。
可置于句首、句尾,有时还可置于主语和谓语之间。
引导条件状语从句的连接词有:if ,unless,as/so long as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。
4.once引导的条件状语从句once引导的条件状语从句,意为“一旦...,就”,从句可置于主句前或后Once you begin,never stop. 一旦开始,就绝不要停止Maths is easy to learn once you understand the rules. 一旦你理解了规则,数学就不难学了。
If引导的条件状语从句
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If引导的条件状语从句很多英语学习者都觉得If引导的条件状语从句这个句型很难,学习起来很吃力。
下面是店铺为你整理的If引导的条件状语从句的相关资料,希望大家喜欢!If引导的条件状语从句用法1.if引导的条件状语从句可以放在主句之前,也可以放在主句之后,如果放在主句之前,中间要用逗号将主句和从句隔开。
例如:If I am free, I will come to see you.= I will come to see you if I am free.如果我有空,我就来看你。
2. 在含if引导的条件状语从句的复合句中,主句用一般将来时,从句通常用一般现在时态表示将来意义,即“主将从现”原则。
例如:If it snows tomorrow, we will go skiing.如果明天下雪,我们就去滑雪。
3. 在含if引导的条件状语从句的复合句中,语句的谓语还可含有情态动词can、must、may等,主句也可是祈使句。
例如:If it stops raining, we can go out.如果雨停了,我们就能出去。
4. 在含if引导的条件状语从句的复合句中,如果主句部分描述的是客观事实或真理,要用一般现在时。
例如:If you heat the ice, it turns into water.如果你加热冰,它就会变成水。
if引导的非真实条件句对过去的虚拟条件从句(if):主语+had done 主句might/would/should/could+have done对现在的虚拟if+ 主语+动词过去式(be用were)主句might/would/should/could+do对将来的虚拟if+主语+动词过去式(be用were)或主语+should do或主语+were to do主句 might/would/should/could+doe.g.Tom got to the station in time because he started earlier.If Tom had started late, he would have missed the train.Do you think the thief entered through the door?No, if he had, I don't believe, he would have broken the living room window.If the book weren't so expensive, I would buy it.If you didn't live so far away, we would be able to visit you more.What would you do if you lost your passport in a foreign country?Why hasn't he come? If he should not come on time, we would have to put off the trip.2.注意事项e.g.If she hadn't work hard at English in the past, she wouldn't work as well as a secretary in a large company now. 混合时间的虚拟语气从句为对过去的虚拟,主句是现在。
英语中if引导的从句
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英语中if引导的从句的类型和注意事项一、if引导的从句的定义if引导的从句是一种条件状语从句,表示在某种条件下,主句中的动作或状态才会发生。
通常译作“假如”、“如果”。
例如:If you study hard, you will pass the exam. 如果你努力学习,你就会通过考试。
If it rains tomorrow, I will stay at home. 如果明天下雨,我会呆在家里。
二、if引导的从句的结构if引导的从句的结构有两种:if + 从句,主句主句 + if + 从句从句和主句的位置可以互换,但如果从句在前,要用逗号隔开。
例如:If you need any help, please let me know. = Please let me know if you need any help. 如果你需要任何帮助,请告诉我。
I will call you if I have time. = If I have time, I will call you. 如果我有时间,我会给你打电话。
三、if引导的从句的用法if引导的从句的用法主要取决于主句和从句的时态和语气,根据主句和从句的关系,可以分为以下三种类型:1. 真实条件句真实条件句表示在现在或将来,如果从句中的条件成立,主句中的结果就会发生。
从句用一般现在时,主句用一般将来时、祈使句或情态动词。
例如:If you don't hurry up, you will miss the bus. 如果你不快点,你会错过公共汽车。
If you are hungry, eat something. 如果你饿了,吃点东西。
If you see him, tell him to call me. 如果你见到他,告诉他给我打电话。
2. 非真实条件句非真实条件句表示在现在或过去,如果从句中的条件成立,主句中的结果就会发生,但实际上条件是不可能或不大可能实现的。
if引导的条件状语从句总结(精)
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if引导的条件状语从句总结(精)if引导的四种条件状语从句一、零条件句/绝对真实条件句(Zero Conditional)零条件句,又叫绝对真实条件句,用于阐述事实。
用来表达在该条件下,结果一定会如此(如规则,客观规律、真理等)。
结构是:If+主语+do/does,主语+do/does。
其从句和主句的谓语动词通常为一般现在时。
二、第一条件句/相对真实条件句(First Conditional)第一条件句又叫相对真实条件句,谈论将来可能发生的事情,并考虑这件事情的结果。
强调偶然性或一次性的条件,也可以与绝对真实条件句同义。
if从句用一般现在时或其他现在时,表示将来可能发生的事情(条件);主句用一般将来时,表示这件事情的结果。
结构是:If+主语+do/does,主语+will do。
三、第二条件句/现在虚拟条件句(Second Conditional)第二条件句是虚拟条件句的一种,即现在虚拟条件句(Unreal Present),用来表达在现在或将来时间下不太可能或不可能发生的条件,这种条件句还可以用来表示试探性的、委婉的语气(可以理解为不大有自信,所以不太真实的条件)。
结构是:①与将来事实相反的非真实条件句是If+主语+should do/were to do/did,主语+would/should/could/might do;②与现在事实相反的非真实条件句是If+主语+did,主语+would/should/could/might+do。
四、第三条件句/过去虚拟条件句(Third Conditional) 第三条件句是表示与过去事实相反的虚拟语气,是用来表达如果(If)当时那样发生,另外一方面(当时)结果会如何。
通常是指过去的事情,带有一切已经太迟而不能够补救的意思。
结构是:If+主语+had done,主语+would/should/could/ might+have done。
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.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.4.if从句用一般现在时,主句用一般现在时5.if从句用现在进行时,主句用一般将来时6.if从句用现在完成时,主句用一般将来时If you have finished dinner I’ll ask the waiter for the bill.。
初中英语初一if条件句
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if条件句【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。
用if引导的条件状语从句15个
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用if引导的条件状语从句15个如果引导的条件状语从句是英语语法中非常常见的句型,用于表达某种条件下发生的情况。
下面将介绍15个以if引导的条件状语从句的相关内容。
1. **Zero Conditional**Zero conditional用于表达普遍真理或习惯性的动作,结构为if + 现在时,现在时。
例如:If you heat water to 100 degrees, it boils.2. **First Conditional**First conditional用于表达将来可能发生的事情,结构为if + 现在时,将来时。
例如:If it rains tomorrow, we will stay indoors.3. **Second Conditional**Second conditional用于表达与现在事实相反的假设,结构为if + 过去时,would/could/might + 原形动词。
例如:If I were rich, I would travel around the world.4. **Third Conditional**Third conditional用于表达与过去事实相反的假设,结构为if + 过去完成时,would/could/might + have + 过去分词。
例如:If I had studied harder, I would have passed the exam.5. **Mixed Conditional**Mixed conditional结合了第二和第三条件句的结构,用于表达过去的假设对现在的影响,或现在的假设对过去的影响。
例如:If I had known you were coming, I would have baked a cake.6. **Unless**Unless的意思是“除非”,引导的条件状语从句表示否定条件。
结构为unless + 句子,相当于if not。
初中英语语法-If引导的条件状语从句(讲解及练习)
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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)。
初中英语If引导的条件状语从句(可编辑修改word版)
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初中英语――if 引导的条件状语从句在if 引导的条件状语从句中,if 和条件句位置灵活,可直接放在主句后面,若if 条件句放句首,从句后面要加逗号,和主句隔开。
还要注意前后时态一致原则.引导条件状语从句的连接词主要有:if(如果)、unless(除非)或as long as(只要)等。
unless 在意思上等于if...not。
一、条件状语从句用法1、引导条件状语从句最常用的连词是if,由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。
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。
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。
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。
2、unless = if...not. 除非,若不,除非在……的时候例如: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,比赛将照常进行。
二、时态问题在条件状语从句中,要注意“主将从现”的规定,即主句用一般将来时,从句用一般现在时表示将来时。
例句:I will come to see you if I have time.我有时间,我就来看你。
三如果if 条件句谈论的是重复发生和预示要发生的情景和事件,则主从句大多用一般现在时态。
总结好的:if引导的条件状语从句
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总结好的:if引导的条件状语从句if引导的条件状语从句if1) 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 .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.⼆、完成句⼦1. 他如果看电视太久了,他的⽗母会不⾼兴。
初中英语语法 if 引导的条件状语从句的基本用法课件
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If it doesn't rain, I will go to the cinema tomorrow.
从句位置灵活,可放在主句之 前,但要用 逗号与主句隔开;也 可放在主句之后。
My mother will take me to the park if she is free.
If he has free time, he will go to Shanghai.
If 引导的条件状语从句------句型转换
1. 借助“祈使句+and/or+句 子”来转换 (and 表顺承, or 表转折) If you study hard, you will pass the exam easily. = Study hard, and you will pass the exam easily. = Study hard, or you won’t pass the exam.
if引导的条件状语从句,在if 引导条件状语从句中要用现 在时态替代将来时,类似还 有连词before,as soon as, while,when等。
2. if 条件状语从句中,如果主句有 must,can,may 等情态动词,从
句用_一__般__现__在__时__。
例如:You must stop if the traffic light ___is_ (be) red.
3. if 条件状语从句中,主句是祈使句, 从句用__一___般__现__在___时表示将来。 主___祈__从___现_原则。
例如:Don’ t wait for me if I __a_m__ (be) late.
初中if引导的条件状从
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if 条件句不一般, 几个要点记心间; 件句,放在前, 逗号要放句中间。 件句表可能, 主将从现不一般; 条件句表事实, 主句常用现在时。
位置:从句可放在主句之前或之后,但是放在主句之前须有逗号隔开 If it rains tomorrow ,I will stay at home.
If you join the band(乐队), you will be famous.
主从句的时态?
If I get up late, I will be late for school. If I don’t finish my homework, I won’t go to bed.
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when it is dark.
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I get up
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at school
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where I study.
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时间状语从句 条件状语从句 比较状语从句 结果状语从句 原因状语从句 目的状语从句 让步状语从句 方式状语从句 地点状语从句 状语从句
一、什么是条件状语从句?
拓展:那么,除了if之外,是否还有( so ) long as…. “只要…, 就… ” 表示 一种前提条件 You’ll succeed as (so ) long as ( if only ) you try hard. 只要你努力,你就会成功。
2.unless .除非;若不;如果不……;除非在……时候
eg:如果我有足够的钱,我就去环游世界
定义:if “如果, 假如” 它引导的句子表示某事发生所需的条件,即“在…条件下,某事才能发生”,在句子中充当状语,称之为条件状语从句。( If引导的条件状语从句表示假如有从句的动作发生,就会有主句动作的发生 )
第10讲 if引导条件状语从句(人教版 八年级英语学习资料)
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第10讲if 引导条件状语从句1、知晓条件状语从句结构及用法。
2、熟练掌握if引导状语从句的同义转换。
【拓展】if /when 引导状语从句和宾语从句这两种从句。
从句的时态的确定。
A.If B.And C.Be D.Or【答案】A【详解】句意:如果你不快点,你将错过公共汽车。
考查连词辨析。
if如果;and和;be是;or否则。
“you don’t hurry up”是错过公共汽车的条件,用if引导条件状语从句。
故选A。
考点2:if引导条件状语从句时态的确定1.—Would you like to go fishing with me this Sunday?—If it ________, I will go.A.doesn’t rain B.rains C.won’t rain D.didn’t rain【答案】A【详解】句意:——这个星期天你愿意和我一起去钓鱼吗?——如果不下雨,我就去。
考查时态。
if引导的条件状语从句,从句中用一般将来时,主句中用一般现在时,根据“If it..., I will go.”可知,此处表达“不下雨”。
故选A。
2.—What are you going to do this weekend?—We’ll go to have a picnic if it ________.A.rains B.is raining C.doesn’t rain D.won’t rain【答案】C【详解】句意:——这个周末你打算做什么?——如果不下雨,我们将去野餐。
考查条件状语从句。
rains第三人称单数形式;is raining现在进行时;doesn’t rain不下雨,一般现在时态;won’t rain一般将来时。
if引导的条件状语从句,主句一般将来时态,从句一般现在时态。
选项B、D不正确。
根据“We’ll go to have a picnic”可知,从句应该是“如果不下雨”,用否定形式doesn’t rain。
if引导的条件状语从句
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if引导的条件状语从句if引导的条件状语从句是中考中常考的知识点,我们一起来学习一下它的具体用法吧!一、连接词ifif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。
还是看看具体例子吧!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”。
在含有条件状语从句的复合句中,如主句在前,从句在后,主从句之间不用标点;如要强调从句的内容,则把从句放在主句的前面,这时主从句之间要用逗号隔开。
例如:I will go to his birthday party if he invites me.=If he invites me, I will go to his birthday party.三、if引导的条件状语从句的时态在一般情况下,如果主句谓语动词表示将来的意义,从句谓语动词用一般现在时表将来。
常见的有以下几种:1. 主句是一般将来时。
例如: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. 主句的谓语动词是want, hope, wish等词。
例如:I hope to visit her if I'm free.如果我有空,我希望去拜访她。
3. 主句的谓语动词含can, may, must等情态动词。
例如: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。
初中基础语法--专题六、if引导的条件状语从句
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初中基础语法--专题六、if引导的条件状语从句一、if 引导的条件状语从句的用法:1、表示在某种条件下某事很可能发生。
表示假如有从句的动作发生,就会或不会有主句的动作发生。
主句用一般将来时态,从句用一般现在时代替一般将来时,即“主将从现”If we pay much attention to the earth, we will have a better world.If it rains tomorrow, what shall we do?If it doesn’t rain tomorrow, we will go fishing.2、如果if 条件句谈论的是事实,则主从句大多用一般现在时态。
If bears are in danger, they attack people.巧学妙记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。
条件句表可能,主句多用将来时;条件句表事实,主句常用现在时。
二、if 引导的条件状语从句的位置:if 条件句位置灵活,可直接放在主句后面,若if 条件句放句首,从句后面要加逗号,和主句隔开。
We can walk there if we can't find a bus .If it rains tomorrow, we will not go to the zoo.if 条件状语从句的练习一.选择正确的答案填空1.May ( will go/go/goes) to Europe if she (will pass/pass/passes) the exams .2. The graduates (will teach/teach/teaches) in the poor village if the Ministry of Education (will agree/ agree/agrees) soon.3. If there (will be/ are/is) a car accident, they (will call/call/calls) 110 for help at once.4. If it (won’t/don’t/doesn’t/ isn’t) rainy, we (will take/ take/takes) walk outside.5. If a UFO (will land/land/lands) in front of me, I (will go/go/goes) in to look for the alien.6. If he (will have/have/has) money, he (will build/build/builds) a science lab.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 May _____________(live) alone, she ____________( keep) a pet parrot.6. Lana ____________( buy) a new dress if the old one ___________(be) out of style.三、单项选择1.If you _____ to the party, you’ll have a great time.A. will goB. wentC. goD. going2.--Do you know when she will come back tomorrow?--Sorry, I don’t know. If she ____ back, I’ll tell you.A. comesB. will comeC. comeD. may come3. What will father _____ us from Japan?A. takeB. bringC. carryD. make4.Weifang is famous ______ kites.A. forB. toC. onD. with5.I ____ her the answer if she ____me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell, asks6. --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.You can to the station if you can’t find a taxi.A. walksB.walkC.walkesD. will walkif 条件状语从句的综合练习一.选择正确的答案填空1.Don’t wait for me if I (am/ will be) late.2.They (won’t/don’t) go to the beach if it (will rain/rain /rains).3. I (will call/ call) you if he (will stay/stay /stays) at home.4. Mr Smith (will let/ let/lets) you know if he (will need/ need/ needs) help.5. (Will / Do/ Does) he visit the museum if he (won’t / don’t/ doesn’t) get tired?6. Where (will/ do/does) they live if they (will miss/ miss/ misses) the bus?二、用所给词的适当形式填空1.The twins _____________(fight) if they_____________(argue).2.Peter________(major) in English if he ____(pass) the exams in Peking University.3. Peter __________( send) me a beautiful souvenir if he __________(tour) Spain.4. If Mr Green ______(say) I am hard- working, my parents __ _____( feel) glad.5.I _________(go) to the beach if it___________ ( not rain) this week.6. _______they ________(have) a match if the P.E. teacher _________(be) busy?7.He ____(write) a letter to his grandparents if he ____(get) his report card this week.8. If she _______(get) up late, she _____________ ( not catch) the early bus.三、单项选择1. What will you do if you _____ to the old folk’s home visit?A. goB. wentC.goingD. will go2. If I eat ____ food, I’ll be very fat.A. too manyB. many tooC. too muchD. much too3. I’ll give the book to h im if he ___ here next Sunday.A. will comeB. comesC. is comingD. came4. There ____an English film in our school tomorrow.A. is going to haveB. will haveC. is going to beD. has5. I’ll wake you up if he ____back.A. willB. is going to comeC. comesD. come。
初中英语If引导的条件状语从句
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初中英语――if引导的条件状语从句在if 引导的条件状语从句中,if 和条件句位置灵活,可直接放在主句后面,若if 条件句放句首,从句后面要加逗号,和主句隔开。
还要注意前后时态一致原则.引导条件状语从句的连接词主要有:if(如果)、unless(除非)或as long as (只要)等。
unless在意思上等于if...not。
一、条件状语从句用法1、引导条件状语从句最常用的连词是if,由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。
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。
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。
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。
2、unless = if...not.除非,若不,除非在……的时候例如: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,比赛将照常进行。
二、时态问题在条件状语从句中,要注意“主将从现”的规定,即主句用一般将来时,从句用一般现在时表示将来时。
例句:I will come to see you if I have time.我有时间,我就来看你。
三如果if 条件句谈论的是重复发生和预示要发生的情景和事件,则主从句大多用一般现在时态。
如:If bears are in danger ,they attack people.误区提醒if 既可以引导条件状语从句,表示“如果”,也可以引导宾语从句,表达“是否”。
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初中英语――if引导的条件状语从句在 if 引导的条件状语从句中,if 和条件句位置灵活,可直接放在主句后面,若 if 条件句放句首,从句后面要加逗号,和主句隔开。
还要注意前后时态一致原则.引导条件状语从句的连接词主要有:if(如果)、unless(除非)或 as long as(只要)等。
unless在意思上等于if...not。
一、条件状语从句用法1、引导条件状语从句最常用的连词是if,由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。
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。
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。
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。
2、unless = if...not. 除非,若不,除非在……的时候例如: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,比赛将照常进行。
二、时态问题在条件状语从句中,要注意“主将从现”的规定,即主句用一般将来时,从句用一般现在时表示将来时。
例句:I will come to see you if I have time.我有时间,我就来看你。
三如果 if 条件句谈论的是重复发生和预示要发生的情景和事件,则主从句大多用一般现在时态。
如:If bears are in danger ,they attack people.误区提醒if 既可以引导条件状语从句,表示“如果”,也可以引导宾语从句,表达“是否”。
辨别它在这两种从句中的时态是我们经常容易出错的地方。
另外,if 和unless的用法也需注意。
典型例题: ----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解析:第一句中if表示“是否”,引导宾语从句,用将来时will go;第二句“如果你的妻子去,我的妻子也去”,if引导条件状语从句,用一般现在时表示将来时。
your wife,单三人称主语,所以用goes 。
总结IF引导的一、表示将来可能发生的:(1) If sb does sth, sb will do sth= sb will do sth if sb does sth主句一般将来时从句一般现在时(2)主句为祈使句或情态动词形式If sb does sth, please do sthIf sb does sth, sb may(情态动词) do sth二、表必然发生的If sb does sth, sb/sth does sth= sb/sth do sth if sb does sth主句一般现在时,从句一般现在时(相当于when引导的从句)Unless引导的sb will do sth unless sb does sthif sb does not do sth练习1.He ______ (fail) in the exam if he ______ (not study) hard.2.Unless you ______ (leave) now, you ______(be) late.3.We ______ (have) a barbecue unless it ______ (rain) .4.Hurry up, or you will miss the bus.(同义句转换)___ you don’t hurry up, you ____ catch the early bus.5.Study hard, or you’ll miss fall behind.(同义句转换)______ you study hard, you______ fall behind.6.If you don’t put on your scarf, you’ll catch cold. (同义句转换)Put on your scarf, _____ you’ll catch cold.7.I don’t know if it_______ tomorrow. )(表是否,用将来时态) If it ____ ,I won’t go shopping. (rain)(表如果,用现在时态)8.I want to know if he _________(come) tomorrow, if he _______(come), I __________(give) the massage to him.9. Please let us know if he ________(arrive) tomorrow.请告诉我们他明天是否会来Please let us know if he _________ (arrive) tomorrow.如果他明天来的话请告诉我们10.I’m sure if he _____(go) to the party, he________ (have)a great time.11.If the rain _______(stop) tonight, we will go to the cinema.12.I’ll buy a computer if I ______(have) enough money.13.You _________(not get) nervous if you _____(do ) enough exercise.14.If she ____ (be) kind to me , I __________(not argue) with her.15.If you _____(pay) more attention to that, he _________ (not get) injured.16.Mr Li will be mad if we _______(break) the rules.17. If it _____ (be) cloudy, they _______(not go) there by air.18.Shall I say “Hello” when the foreigner ______(come) into the classroom?19.He’l l get better grades if he _________ (study )hard.20. If you work really hard, you _______ (be) famous and rich.if 条件状语从句的时态练习一.在正确的答案下划一条线。
1.Daina ( will go/go/goes) to Europe if she (will pass/pass/passes) the exams .2. The graduates (will teach/teach/teaches) in the poor village if the Ministry of Education (will agree/ agree/agrees) soon.3. If a UFO (will land/land/lands) in front of me, I (will go/go/goes) in to look for the alien.4. If he (will have/have/has) money, he (will bulid/build/builds) a science lab.5.Don’t wait for me if I (am/ will be) late.6.They (won’t/don’t) go to the beach if it (will rain/rain /rains).7. I (will call/ call) you if he (will stay/stay /stays) at home.8. (Will / Do/ Does) he visit the mu seum if he (won’t / don’t/ doesn’t) get tired?9. Where (will/ do/does) they live if they (will miss/ miss/ misses) the bus?二、用所给词的适当形式填空1.If you ________(feel) tired, you _______________ (have) to have a rest.3. If there __________(be) fewer trees, there _______________( be) more pollution.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.Ⅰ.单项选择(15分)1.If you _____ to the party, you’ll have a great time. A. will go B. went C. go D. going2. It 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. take B. bring C. carry D. make4. Weifang is famous ______ kites. A. for B. to C. on D. with 5. I ____ her the answer if she ____me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell, asks6. – 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 ____ back, 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. I’ll give the book to him if he ___ here next Sunday.A. will comeB. comesC. is comingD. came1---5 CDBAD 6---10 DAACB 11---15。