深圳初中英语if引导的条件状语从句

If引导的条件状语从句

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。

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。

If the weather is bad next week, we'll put off the climbing.

如果下周天气不好，我们将推迟爬山。

Father told me if i worked hard he would buy me a gift.

爸爸告诉我，如果我努力学习，他会给我买一份礼物。

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，主句常用一般现在时。

在 if 引导的条件状语从句中，如果从句谈论的是一个有可能发生的事实及其产生的相关的结果，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.（表可能）

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.

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

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 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 outs ide.

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 bulid/build/builds) a science lab.

7.Don’t wait for me if I (am/ will be) late.

8.They (won’t/don’t) go to t he beach if it (will rain/rain /rains).

9. I (will call/ call) you if he (will stay/stay /stays) at home.

10. Mr Smith (will let/ let/lets) you know if he (will need/ need/ needs) help.

I.单项选择

1.I f you _____ to the party, you’ll have a great time.

a. will go

b. went

c. go

d. going

2.It will be a long time ____ peter _____ his work.

a. since, has finished

b. after, finishes

c. when, will finish

d. before, finishes.

3. what will father _____ us from Japan?

a. take

b. bring

c. carry

d. make

4. Weifang is famous ______ kites

a. for

b. to

c. on

d. with

5．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

6. – 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

7.—Do you know when he will come back tomorrow?

--sorry, I don’t know. when he ____ back, I’ll tell you.

a. comes

b. will come

c. come

d. may come

8. what will you do if you _____ to the old folk’s home visit?

a. go

b. went

c. going

d. will go

9. If I eat ____ food, I’ll be very fat.

a. too many

b. many too

c. too much

d. much too

10.I’ll give the book to him if he ___ here next sunday.

a. will come

b. comes

c. is coming

d. came

11. There ____an english film in our school tomorrow.

a. is going to have

b. will have

c. is going to be

d. has

12.Could you tell us where ____？

a. will the next olympic games held

b. the next olympic games will be held

c. would the next olympic games be held

d. the next olympic games would be held

13. When my mother returned last night,I ____ a book.

a. read

b. am reading

c. was reading

d. am going to read

14. What ____ you ____ when it began to rain?

a. do, do

b. were, doing

c. are, doing

d. did, do

15. I’ll wake you up when he ____back.

a. will

b. is going to come

c. comes

d. come

II、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.

(完整版)初中条件状语从句精讲和练习含答案

初中英语：条件状语从句 一．条件状语从句的概念 条件状语从句，即在某种条件下，一件事情可能发生。在英语中由连接词if或unless等 引导的状语从句叫做条件状语从句。条件是指某一件事情实现之后（状语从句中），一件事 情（主句）才能发生，通常译作“假如，只要，如果”等意思。条件状语从句中，主从句的时 态要遵循“主将从现”的原则。即，主句是将来时态时，从句用一般现在时代替将来时态。 二.条件状语从句的引导词 1.If conj . 如果，假如 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。 2.unless conj.除非,若不,除非在……的时候（if ...not...） You will fail to arrive there in time unless you start earlier. 如果你不早点动身,你就不能及时赶到那儿。Unless it rains, the game will be played. 除非下雨,比赛将照常进行。 3.so/as long as conj.只要 You may borrow my book as long as you keep it clean. 只要你保持书的清洁，你就可以把我的书借去。 三．关于条件句的时态，常见的有以下三种情况： 1、条件状语从句的主句是一般将来时，那么从句常常用一般现在时。 When I grow up, I’ll be a nurse and look after patients. 我长大后要当一名护士，照顾病人。 2、如果主句是祈使句，那么从句通常要用一般现在时。 If you want to have a chat ,call me up. 如果你想聊天，打我电话。 3、如果主句是含有情态动词时，根据需要从句多用一般现在时。 You should be quiet when you are in the reading room. 在阅览室时应保持安静。 四．知识拓展 1在以when，before，as soon as等引导的时间状语从句，也适用“主将从现”原则，即如果主句是一般将来时，从句则用一般现在时。 I'll tell her the good news when she comes back. 当她回来的时候，我将把这个好消息告诉她。 she will give you a call as soon as she returns. 她一回来就会给你电话。 2.If条件句的同义句：祈使句，and /or+将来时态的陈述句。 Work hard ,and you will make great progress.= If you work hard,you will make great progress. 如果你努力学习，你才会取得大的进步。 Hurry up, or you will be late.=If you don’t hurry up.you will be late.如果你不快点，你就要迟到了。

if引导的条件状语从句讲解和练习(答案)

t 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 ’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 yo u 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。

初中英语——条件状语从句

初中英语―条件状语从句 一．条件状语从句的概念 条件状语从句，即在某种条件下，一件事情可能发生。在英语中由连接词if或unless 等引导的状语从句叫做条件状语从句。条件是指某一件事情实现之后（状语从句中），一件事情（主句）才能发生，通常译作―假如，只要，如果‖等意思。条件状语从句中，主从句的时态要遵循“主将从现”的原则。即，主句是将来时态时，从句用一般现在时代替将来时态。 二.条件状语从句的引导词 1.If conj . 如果，假如 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。 2.unless conj.除非,若不,除非在……的时候（if ...not...） You w ill fail to arrive there in time unless you start earlier. 如果你不早点动身,你就不能及时赶到那儿。 Unless it rains, the game w ill be played.除非下雨,比赛将照常进行。 3.so/as long as conj.只要 You may borrow my book as long as you keep it c lean. 只要你保持书的清洁，你就可以把我的书借去。 三．关于条件句的时态，常见的有以下三种情况： 1、条件状语从句的主句是一般将来时，那么从句常常用一般现在时。 When I grow up, I’ll be a nurse and look after patients. 我长大后要当一名护士，照顾病人。 2、如果主句是祈使句，那么从句通常要用一般现在时。 If you want to have a chat ,call me up. 如果你想聊天，打我电话。 3、如果主句是含有情态动词时，根据需要从句多用一般现在时。

if引导的条件状语从句练习题

If条件句专练 I单项选择 1. If he hard, he will get good grades. A. study B. studies C. will study D. studied 2. I want to know if Mary to the party tomorrow. A. go B. went C. will go D. goes 3. Everyone must dress up. If you, they won’t let you in. A. don’t B. won’t C. can’t D. mustn’t 4. Mary will go to Sanya if she a five-day trip. A. have B. had C. will have D. has 5. If he comes late,he will miss the train.

A. and B. so C. / D. or II用所给词的适当形式完成句子 1. If Bruce ________(be) free, Let’s go to the park. 2. Tell him the news if you ________ ( meet ) him tomorrow. 3. If he ________(do) well in the exam. His teacher will be pleased with him. 4．If Mary ______(leave ) home too long, she ________(miss) her parents. 5. Be quick ,and you _________(arrive) in time. 6. Hurry up, or you_________(be ) late for school. 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 you_________ ________,you ________ good ___________. 3.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. 4.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. 5.如果明天不下雨,我会和你一起去公园的.

if引导的条件状语从句

语法10单元语法再现梁老师组稿2017-12-31 一、观察下面的句子 If you go to the party, you will have a great time. If you do , you will be late. If you do,you will be sorry. If they have it today, half the class won’t come. If we ask people to bring food, they will just bring potato chips and chocolate. 以上几个句子中“if”有相同的含义“如果”，引导条件状语从句逗号后面的句子是主句。整个连起来的大句子叫主从复合句。 注意主句和从句的时态有什么特点。 总结：If引导的条件状语从句用一般现在时，主句用一般将来时。 简称“主将从现” 练习：（1）If you ______(come)here, you ___________(be) happy. (2) If it _________(rain) tomorrow, we__________(not, go) to the park. (3) If he _________(come) here, I ___________(call) you. (4) If it ___________(not rain), we _________(have) a picnic(野餐). (5) If we do that, more people _________(want) to play the games. 页脚内容1

If引导条件状语从句的详细用法解答

If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/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。 3．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。 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。5．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。 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. 如果你吃完了，我就叫服务生来算账 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。

初中英语——If引导的条件状语从句

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。 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。 If the weather is bad next week, we'll put off the climbing. 如果下周天气不好，我们将推迟爬山。 Father told me if i worked hard he would buy me a gift. 爸爸告诉我，如果我努力学习，他会给我买一份礼物。

if条件状语从句专练

If条件状语从句专练 1. If I ___(go) to the party, they ___(be) upset. 2. If I ___(take) a taxi, it ___(be) too expensive. 3. If she ___(finish) work early, she can go home. 4. If the weather is fine, we ____(go) for a walk. 5. If I ___(have) time tonight, I will finish the book. 6. If it ___(rain) next Sunday, we won`t be able to plant trees. 7. If she ___(arrive) home, she will phone

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