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八年级上英语--If引导的条件状语从句(汇编)

八年级上英语--If引导的条件状语从句(汇编)
八年级上英语--If引导的条件状语从句(汇编)

13夏八年级英语语法专项if引导的条件状语从句专项练习

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。

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

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。

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。

1.if从句用一般现在时,主句用一般将来时

If he runs he’l l 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 f ind 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 Array I’ll ask the waiter for the bill.

如果你吃完了,我就叫服务

生来算账

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。

备注: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引导的条件状语从句专项练习

Ⅰ.单项选择

()1.If you _____ to the party, 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 h ome?

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.

初二英语 条件状语从句

条件状语从句 1、定义由引导词if 或unless 引导的状语从句叫做条件状语从句。在英文中,条件是指某一件事情实现之后(状语从句中的动作,其它事情(主句中的动作才能发生,通常译作" 假如" 。(注意:在含有条件状语从句的复合句中,表示将来时态,主句是一般将来时态, 祈使句或谓语动词是情态动词,从句要用现在时态, 即[主将从现原则]。 Eg1: Take the medicine, you will be fine. Eg2: If you can read as many English books as possible, your English will be improved. 2、用法语法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if 引导的条件状语从句既可以将从句放前面也可以将从句放后面。除了if 之外,还有其他连词也可以引导条件状语从句。 【注:在条件状语从句中,绝大数情况下some 要变为any 。】 (1 unless conj.除非,若不,除非在……的时候 Eg1: 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。 Eg2: Unless it rains, the game will be played.除非下雨,比赛将照常进行。 (2 on condition(that...在……条件下,如果 on condition (that...引导的是主句事件发生的前提条件或唯一条件。 Eg1: I can tell you the truth on condition that you promise to keep a secret.我可以告诉你真相,条件是你答应保密。 Eg2: You can go swimming on condition (that you don't go too far from the river bank. 你只有在不远离河岸的条件下才可以下水游泳。 Attention (注意): ① unless = if...not. Eg: 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. ② if 引导的条件句有真实条件句和非真实条件句两种: 真实条件句 Eg :If it rains tomorrow, we won’t go on a park 非真实条件句是虚拟语气的一种,表示与事实相反,主句用would do,从句用过去式,具有假设性,一定不会是真的, 即所假设的事情基本不会有发生的可能。 Eg :If I were you, I would go with him. ③so/as long as (只要)、in case(万一)引导。 Eg1: So long as you’re happy, it doesn’t matter what you do. 只要你高兴,你做什么都没有关系。 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。 Eg2: Take your umbrella in case it rains. 带着你的伞吧,以防下雨。 ④“祈使句+and / or+简单句”。其中and 表示句意顺承;or 则表示转折,意为“否则”。Eg1: If you work harder, you’ll pass the exam. = Work harder, and you’ll pass the exam. 如果你再努力些,你就会通过考试。

状语从句9种全

状语从句 在复合句中作状语的从句叫状语从句。状语从句有时间、地点、原因、目的、结果、条件、方式、比较、让步等种类。 一、时间状语从句 引导时间状语从句的连接词有: when, as, while, after, before, since, ever since, as soon as, once, till, until, whenever, no sooner…than, hardly/scarcely...when, the moment/minute/instant/second, every time, each time, any time, the first time, next time, last time, all the time, by the time, directly, immediately, instantly等。 1.表示“一···就···”的句型 1) as soon as/once As soon as he arrives, I'll call you.他一到,我就给你打电话。(as soon as 侧重时间或动作先后衔接紧,而once侧重条件,表示“一旦...”) 2) on doing sth/on one's + n.作时间状语 On arriving at the station, the thief was arrested. 一到达车站,这个小偷就被逮捕了。 On his arrival in Paris, he was recognized as a noble and thrown into prison. 他一到达巴黎,就被认出是一个贵族,并被投入监狱。 3) no sooner ...than , hardly/scarcely...when 它们表“一…就”。结构中的否定词放在句首时,主句要倒装。(主句都用过去完成时,从句用一般过去时。) No sooner had he reached home than it began to rain. 他刚到家,天就开始下雨了。 Hardly/Scarcely had I entered the room when the phone rang. 我一进屋,电话就响了。 注意当no sooner, hardly, scarcely不放在句首时,主句不倒装,如: I had no sooner reached the bus stop than the bus started. 我刚到车站,车就开走了。 I had scarcely(hardly)entered the room when the phone rang. 4)the moment, the instant, the minute, the second The moment I saw him, I recognized him. 我一看见他,就认出了他。 We'll leave the minute you are ready. 你一准备好,我们就出发。 5)有些副词如:instantly, immediately, directly可用作连词,后接从句。 I left immediately the clock struck 5. 我刚走,钟就敲了五点。 2. when, while, as引导时间状语从句 1) when的用法

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。

条件状语从句初二英语

2015-12-20 条件状语从句 1、定义 由引导词if或unless引导的状语从句叫做条件状语从句。在英文中,条件是指某一件事情实现之后(状语从句中的动作),其它事情(主句中的动作)才能发生,通常译作"假如"。(注意:在含有条件状语从句的复合句中,表示将来时态,主句是态,或谓语动词是,从句要用态,即[原则]。 Eg1: Take the medicine, you will be fine. Eg2: If you can read as many English books as possible, your English will be improved. 2、用法 语法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if引导的条件状语从句既可以将从句放前面也可以将从句放后面。除了if 之外,还有其他连词也可以引导条件状语从句。 【注:在条件状语从句中,绝大数情况下some要变为any。】 (1) unless conj.除非,若不,除非在……的时候 Eg1: You will fail to arrive there in time unless you start earlier.如果你不早点动身,你就不能那儿。 Eg2: Unless it rains, the game will be played.除非下雨,比赛将照常进行。 (2) on condition(that)...在……条件下,如果on condition (that)...引导的是主句事件发生的前提条件或唯一条件。 Eg1: I can tell you the truth on condition that you promise to keep a secret.我可以告诉你真相,条件是你答应保密。 Eg2: You can go swimming on condition (that) you don't go too far from the river bank.你只有在不远离河岸的条件下才可以下水游泳。 Attention(注意): ①unless = if...not. Eg: 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. ②if 引导的有和两种: 真实条件句Eg:If it rains tomorrow, we won’t go on a park

初中英语语法——If引导的条件状语从句(讲解及练习)

条件句从句主句 真实一般现在时一般将来时 情态动词+动原祈使句 非真实 一般过去时 be动词用(were) would/could+动原初中英语――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 用法例句 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)。We will stay at home if it rains tomorrow. 如果明天下雨,我将要呆在家。 ②主句中含有情态动词,if从句用一 般现在时态。If you finish your homework, you can go home now.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’t jump into the river if you feel very hot. 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)。此时,表达的是和现实相反的推测,用虚拟语 气。If I were you, I wouldn’t do it like that.如果我是你,我就不会那么做的。 If you gave me some money, I would be very happy. 如果你给我一些钱,我就会很高兴的。 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. (2)“祈使句 + and (or)+ 陈述句”

(完整版)英语状语从句汇总整理版

英语中的九大状语从句 状语从句在主从复合句中修饰主句中的动词、形容词或副词等,按意义可以分为时间、地点、原因、目的、结果、条件、方式、比较、让步等状语从句。 一.时间状语从句。 通常由从属连词when, whenever, as, while, before, after, as soon as, till, until, since, once (一旦), hardly……when…, no sooner…….than…; 等引导。例如: The cyclist started just as the lights changed to green. Whenever we met with difficulties , they cam to help us. He didn’t leave his office until he had finished the day’s work. 应注意的问题 1.在时间状语从句中,通常要用动词的一般现在时态表示一般将来时态,用一般过去时态表示过去将来时态。但when 引导一般疑问句或名词性从句时不受上述语法规则的限制,因此,应该加以区分。例如: When China will enter WTO depends on the bilateral (双边的)joint efforts. Once you understand the rules of the game, you’ll enjoy it. 2.when , while, as 的不同用法。一般说来,当主、从句的动作是同时发生的事,三者可以换用。when 既可以引导一个持续动作,也可以引导一个短暂动作,可用于主句和从句动作同时发生或从句动作先于主句动作;while 引导的动作必须是持续性的,强调主句和从句的动作同时发生,往往侧重主句和从句动作的对比;as 用于引导“在某行为的继续中发生某事”的“继续之行为”,所以多与过去进行时连用,翻译成“一边……一边……”或者表示动作的变化,翻译成“随着……”。 例如: I hope you’ll think of my words as/when/while you drive on the busy roads. When he realized it, the chance had been lost. When he came home, I was cooking dinner. I was fat when I was a child. He took a bath while I was preparing dinner. As I was walking down the street, an American asked me for the directions to the nearest station. He sang songs as he was taking a bath. As he gets older he gets more optimistic.

if引导的条件状语从句

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