中考英语题型专题复习讲义if引导的条件状语从句

语法二:if引导的条件状语从句

【语法示例】

1.如果你去参加派对,你会玩的很开心!______you go to the party,you ______ have a great time!

2.如果我们今天举办(聚会),一半的学生不会来。______they have it today,half the class ______ come.

3.如果你那样做,你将会很遗憾。______ you do, you______be sorry. 【语法概述】

在复合句中作条件状语的句子叫__________________.条件状语从句常用______ 来引导。

If 引导的条件状语从句表示假如______的动作发生,______的动作就(不)会发生。

【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。放句首时,从句后面要用逗号和主句隔开。

1.主将从现:主句____________,从句____________。

①如果我有时间,我将会去看你。I______ go to see you ______ I have time.

②如果明天下雨,我们将待在家里。______ it rains tomorrow, we______ stay at home.

2.主情从现(may,might,can,must,should等):主句____________,从句____________。

如果你吃变质的食物,你可能会生病。______ you eat bad food,you ______ be ill.

3.主祈从现:主句____________,从句____________。

如果灯是红的,等一会儿。______ the light is red,______ ______ a minute. 【同义句转换】

1. 用“祈使句+and/ or+一般将来时的句子”转换。and表顺承关系,or表否则。

①If you work hard, you’ll pass the exam easily.= Work hard, ______ you’ll pass the exam easily.

②If you don’t hurry up, you’ll miss the train.=Hurry up, ______ you’ll miss the train.

2. 用含介词with()或without()的介词短语转换。

①If there is no water, fish can’t live. = Fish can’t live _________ __________.

②I won’t work out the problem if you don’t help me.=I won’t work out the problem______ ______ ______.

△unless= if…not除非,如果不

unless连接条件状语从句,在用unless表示将来情况时,主句用将来时,从句要用一般时表将来,此种用法适用于条件状语从句和时间状语从句。

除非他被邀请否则他不会来。=如果他不被邀请的话他将不会来。

He ______ not come ______ he is invited.= He ______ not come______ he isn’t invited.

试试看:

①You will fail in the exam ________you work hard.=You will fail in the exam

________you don’t work hard.

②He will come _______ it rains.=He will come _______ it doesn’t rain.

△拓展:1.If作“是否”讲,引导____________ 从句。

我不知道他明天是否会去学校。I don’t know ______ he will come to school tomorrow.

高频易错点:

I don’t know if our friend will come.If he comes,we’ll let you know.

翻译:

2.当主句是过去的某种时态时,if的从句要用过去的某种时态。

Lucy asked Tom if he was afraid of dogs.翻译:

-语法作业

I.用所给词的适当形式填空。

1.My sister will go to the beach with her friends if she ________(pass) the exam.

2.Rabbits _________(run) away if they _______(see) people.

3.He ______(go) to see a doctor if he _________(feel) sick.

4.She _______(be) a good dancer if she __________(practice) often.

5. If it __________(not rain) tomorrow, I _______(go) swimming.

6.We’ll go boating if it ________(be)sunny tomorrow.

7.If you ________(not go) to the party, you _________(be) sorry.

8.If he __________(stay) at home, he’ll be sorry.

9.The teachers won’t let her in if she ___________(wear) jeans to the party.

10If you’re not better by then, I ___________(take) you to see the doctor.

II.选择题

( )1. You’ll learn English well ____ you put your heart into it.

A.if

B.before

C.until

D.unless

( )2. We’ll go to the Great Wall if it _______ tomorrow.

A. doesn’t rain

B. rains

C. won’t rain

D.didn’t rain ( )3. I don’t know if it __.You’ll get wet if it __.You’d better take an umbrella.

A. will rain, will rain

B. rains, will rain

C. will rain, rains

D. will rains, will rains

( )4. Simon ______ his grandparents if he ______ free.

A. will visit, will be

B. visits, will be

C. will visit, is

D.visits, is ( )5. They _____their teacher for help if they _____ problems.

A. will ask, will have

B.will ask, have

C.ask, will have

D.ask, have ( )6. If you ____ to visit the zoo, you _____ a lot of interesting animals.

A.will go, will see

B.go, will see

C. will go, see

D.go,see ( )7. Mike _______a top student in his class if he ______ hard.

A. will be, will work

B. is, works

C.will be, works

D.is, will work

( )8. If we ______ more bamboo, pandas ______ more food.

A.will grow, will have

B.grow, will have

C.will grow, have

D.grow, have

( )9. If there _______ a baby tiger, tigers _______ as a family.

A. will be, will live

B. is, will live

C.is, live

D.will be, live ( )10. If people _____ wild animals, they _____ out.

A.won’t protect, will die

B.don’t protect, will die

C.won’t protect, die

D.don’t protect, die

( ) 11. I don’t know if yo u _____. If you _____, please call me tonight.

A.will come, will come

B. comes, comes

C. comes, will come

D.will come, come

( )12. I am not sure if you _ _in the exam, but you’ll be better if you __ harder.

A.succeed; work

B. succeed; will work

C. will succeed; work

D. will succeed; will work

( )13. You’ll do much better ____you’re more careful with your spelling.

A.if

B.until

C.unless

D.though ( )14. I’m waiting for my friend., I’ll go shopping alone.

A. If she comes

B. If she will come

C. If she doesn’t come

D. If she didn’t come

( )15. we don’t save water, we will have no water to drink one day.

A. Where

B. When

C. Although

D. If

( ) 16. We will go for a picnic if it tomorrow.

A. doesn’t rain

B. wasn’t rain

C. won’t rain

D. wasn’t raining ( )17. Don’t speak loudly the party. If you do, you’ll leave.

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) 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

if引导的条件状语从句中考解析

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) [定义] 条件状语从句通常由if(如果),unless(除非),as long as(只要)引导。 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。[句子结构] 中考考点之[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:

例句: 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。 [同义句转换] 1. If引导的条件状语从句可以用“祈使句,+and / or +一般将来时的句子”转换。 祈使句,+and+陈述句可以转化为if 引导的肯定条件状语从句。 祈使句,+or+陈述句可以转化为if 引导的否定条件状语从句。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, or you’ll miss the train. 快点儿,否则你就赶不上火车了。 真题(2010重庆中考)Work hard,________ you may catch up with your classmates soon. A.or B.but C.and D.yet 课后练习:用if连接下列句子 1、Go to bed early,and you will have a good rest. 2、Hurry up, or you’ll miss the bus. 2. 用含介词with或without的介词短语转换。如: If there is no water, fish can’t live. → Fish can’t live without water. 离开水,鱼不能生存。 [if引导的条件状语从句和宾语从句的区别]

中考英语题型专题复习讲义if引导的条件状语从句

语法二:if引导的条件状语从句 【语法示例】 1.如果你去参加派对,你会玩的很开心!______you go to the party,you ______ have a great time! 2.如果我们今天举办(聚会),一半的学生不会来。______they have it today,half the class ______ come. 3.如果你那样做,你将会很遗憾。______ you do, you______be sorry. 【语法概述】 在复合句中作条件状语的句子叫__________________.条件状语从句常用______ 来引导。 If 引导的条件状语从句表示假如______的动作发生,______的动作就(不)会发生。 【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。放句首时,从句后面要用逗号和主句隔开。 1.主将从现:主句____________,从句____________。 ①如果我有时间,我将会去看你。I______ go to see you ______ I have time. ②如果明天下雨,我们将待在家里。______ it rains tomorrow, we______ stay at home. 2.主情从现(may,might,can,must,should等):主句____________,从句____________。 如果你吃变质的食物,你可能会生病。______ you eat bad food,you ______ be ill. 3.主祈从现:主句____________,从句____________。 如果灯是红的,等一会儿。______ the light is red,______ ______ a minute. 【同义句转换】 1. 用“祈使句+and/ or+一般将来时的句子”转换。and表顺承关系,or表否则。 ①If you work hard, you’ll pass the exam easily.= Work hard, ______ you’ll pass the exam easily. ②If you don’t hurry up, you’ll miss the train.=Hurry up, ______ you’ll miss the train. 2. 用含介词with()或without()的介词短语转换。 ①If there is no water, fish can’t live. = Fish can’t live _________ __________. ②I won’t work out the problem if you don’t help me.=I won’t work out the problem______ ______ ______. △unless= if…not除非,如果不 unless连接条件状语从句,在用unless表示将来情况时,主句用将来时,从句要用一般时表将来,此种用法适用于条件状语从句和时间状语从句。 除非他被邀请否则他不会来。=如果他不被邀请的话他将不会来。

初中英语If引导的条件状语从句

中考英语专题复习 if引导的条件状语从句 一、真实条件状语从句:表示假设在某条件的存在下,主句中的主语可能会发生某种动作或存在某种状态。 主从句时态;(1)从句:一般现在时、现在进行时、现在完成时------主句:一般将来时(2)从句:一般现在时,-------- -----------------------------主句:含情态动词 (3)从句:一般现在时,---------------------------------------主句:祈使句※:(4)如果主句描述的是客观真理,采用一般现在时。 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。 (1).if从句用现在进行时,主句用一般将来时 If you are looking for Peter you’ll find him upstairs. 如果-你是在找彼得,上楼就会找到他。(1).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. 如果你吃完了,我就叫服务生来算账(2).if从句用一般现在时,主句用may/might/can 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。 If it stops snowing we can go out. 如果雪停了,我们就可以出去。 (2).if从句用一般现在时,主句用must/should 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。(3)if从句用一般现在时,主句用祈使句 Please go to school on time if you see it. (4).if从句用一般现在时,主句用一般现在时 If you heat ice ,it turns to water. (也可用will turn)如果把冰加热,它就会化成水。 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。 条件句表可能,主句多用将来时; 条件句表事实,主句常用现在时。 在if 引导的真实条件状语从句中,初中阶段要掌握的:主句用一般将来时态,从句用一般现在时态。如: We can walk there if we can't find a bus . If it rains tomorrow ,we will not go to the zoo. What will you do if you find a panda in danger.

If引导的条件状语从句

If 引导的条件状语从句 If 引导的条件状语从句遵循主过从过、主将从现的原则。 主将从现(主情从现、主祈从现) If it rains tomorrow,I won’t climb the hills. If it doesn’t rain tomorrow,I will go to the countryside with my friends. If 引导的条件状语从句 If 引导的条件状语从句遵循主过从过、主将从现的原则。 主将从现(主情从现、主祈从现) If you will help me,I'll finish it on time. We may go out if it's fine tomorrow. If you finish your homework,you can watch TV. Please call me if you go shopping next Sunday. If I go there,I'll take her some flowers. We'll stay at home if it rains tomorrow. Please call me if he’s at home. If you work harder,you’ll pass the exam. She will visit her grandpa if she has time tomorrow. We’ll take a taxi to the city if the train doesn’t arrive on time. The teacher will be angry if he is late. If引导的条件状语从句与unless引导的条件状语从句的转换

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.or B.but C.and D.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。答案:C 黑色陷阱:本题的陷阱是句型,本句型区别于“祈使句+or”,这个句型的含义是“……,不然的话/否则……”。 绿色通道:祈使句后面既可以加and,也可以加or,所以要全面分析句意,再作决定。 小试牛刀:用if连接下列句子 1、Go to bed early and you will have a good rest. 2、Hurry up, or you’ll miss the bus. 三、if从句与主句具有以下特点: 1.If从句中用一般现在时,表示未来的一种条件,从句中可以加时间状语。 e.g.If you can’t come tomorrow, we can hold the party a little later.明天你如果不能来,我们可迟一点举行宴会。 If it doesn’t rain tomorrow, we’ll g o to the Great Wall. 明天如果不下雨,我们就去长城。

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

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