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名师讲解:if引导的条件状语从句

名师讲解:if引导的条件状语从句
名师讲解:if引导的条件状语从句

名师讲解:if引导的条件状语从句

【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.

参考答案:

1 have

2 doesn’t

3 are

4 were

5 knew

6 were to eat

7 would be

8 worked

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。

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比较状语从句: 状语从句指句子用作状语时,起副词作用的句子。比较状语从句是其中的一种,主要运用于形容词和副词的原级、比较级及最高级的句子之中。原级:as…as (和……一样),not so(as)…as …(和不一样);比较级:more…than(更);最高级:The most…in/of, the + 形容词+est…of/in。常用引导词:as(同级比较),than(不同程度的比较);特殊引导词:the more … the more … ;just as …,so…;A is to B what /as X is to Y;no … more than;not A so much as B。 比较状语从句通常由as或than引起,这类从句和大多数状语从句不同,它们不修饰动词,而是修饰as,so,less,more等副词,或其他比较级的词,如taller, harder.在这里讨论它们,不是作为动词修饰语,而是作为一种状语从句。包含这类从句的句子通常为L,即从句在后:She is as tall as I(or me). He works as hard as his brother(does). He does not work as hard as his brother. He does not work so hard as his brother. No other men work as(or so) hard as his brother (does).No other men work as hard as does his brother. She is taller than I(or me). She is taller this year than(she was tall)last year. She is more shy than unsocial. She thinks more about her appearance than(she thinks about)her personality. She finds it easier to read than to write. She is not taller than I.(Both are tall.) She is no taller than I.(Both are short.)注意这两句话的区别。 I cannot persuade him any more than your persuade a pillar.(= I am unable to persuade him,just as you are unable to persuade a pillar.) I can forget her no more than she(forgets)me. Nothing is more dangerous than that you (should)make friends with him. I will help you rather than that you(should)have any trouble.rather than 而不是…

if引导的条件状语从句

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初中英语条件状语从句语法详解

初中英语条件状语从句语法详解 (名师剖析语法知识点+ 实战训练题,值得下载打印) 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 lo ok 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。

高考状语从句讲解

状语从句 一、时间状语从句 1、when, while, as 和whenever when 表时间点,时间段 while 表时间段;有“而”的意思 as “当……”,“一边……一边”,“随着……” whenever 每当,无论什么时候 It is cold when it snows. While there is life, there is hope. While we were speaking, he was reading newspaper. Just as Mrs Richards was entering the dinning-room, there was a knock on the front door. As we age, we trade strength for ingenuity, speed for thoroughness, and passion for reason. 随着年龄的增长,我们用力量换来了机敏,以速度换来了严谨,以热情换来了理智。 注:1)when还可作并列连词,其意义为“那时,这时”,相当于and at this/that time。常用于下列句式: sb.was doing sth.when...某人正在干某事就在这时…… sb.was about to/ going to do sth.when...某人正打算干某事就在这时…… sb.body has just done sth.when...某人刚干了某事就在这时…… 2)如果主句表示的是短暂动作,而从句用延续性动词的进行时态表示在一段时间内正在进行的动作时,when,while 与as可互换使用。如: When/While/As I was walking down the street,I came across an old friend of mine. 2、before/ after It will be five years before we meet again.五年之后我们才能见面。 After you think it over, please let me know what you decide. After her husband had gone to work, she sent her children to school. 3、until, till, not...until 1)肯定句:主句的谓语是延续性动词,主从句均为肯定式,意为“某动作一直持续到某时间点才停止”

初中英语——If引导的条件状语从句

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高中英语语法---条件状语从句讲解

条件状语从句 概念定义 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,祈使句或情态动词,从句要用现在时态,[主将从现原则](主将从现,将并非指将来时,还指表示将来含义的,跟着if后的那句话是从句。) 类型 条件状语从句 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。如: 1) If you ask him,he will help you. 如果你请他帮忙,他会帮你的。 2) 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 (如果天下雨,我们就不玩了)If it rains,we will stop playing.‘ 转为We will stop playing if it rains. if引导的条件状语从句

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。I would have arrived much earlier if I had not been caught in the traffic.如果没有堵车,我会到的早一点儿。 那么,除了if之外,是否还有其他连词也可以引导条件状语从句呢?回答是肯定的,不仅有,还有很多。这些词由于出现的频率较小,且用法较复杂一些,所以不如if为大家所熟知罢了。下面就这些词的用法以例句的形式进行一下简单总结。 1、unless conj.除非,若不,除非在……的时候 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。 2、on condition(that)...在……条件下,如果 on condition (that)...引导的条件从句是主句事件发生的前提条件或唯一条件。 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。 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。 3、supposing conj.如果,假如 supposing引导的条件从句表示一种假设条件。 Supposing it rains,shall we continue the sports meeting?倘若下雨,我们的运动会还要继续举行吗? Supposing anything should go wrong,what would you do then?假如出了什么问题,你准备怎么对付?

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区别。as和when引导的从句既可表示一点时间,也可表示一段时间,从句中的谓语动词既可以是持续性动词,也可以为短暂性动词,经常可以互换使用;while引导的从句通常表示一段时间,从句中宜用持续性动词作谓语。当从句中的谓语动词为持续性动词时,这三者可以通用(前面例句中已有体现),再如: 1 / 18 Mother was worried because little Alice was ill, especially as / when / while father was away in France.妈妈担心,因为小艾丽思病了,特别是当父亲远在法国的时候。 如果从句和主句要表示一个人的两个动作交替进行或同时完成时,则多用as,可译为“一边......,一边......”。例如: He looked behind from to time as he went.他一边走,一边不时地往后看。 As time goes on, it's getting warmer and warmer..随着时间的推移,天气变得越来越暖了。 I thought of it just as you opened your mouth.你一张嘴我就知道你要 说什么。(若表示两个短促动作几乎同时发生时,用as的场合多于when.) 当主从句之间表示转折或对比关系时,多用while, 不用as或when。如:

when时间状语从句讲解教案教程文件

资料收集于网络,如有侵权请联系网站删除状语从句之时间状语从句 一.概念及分类名。复合句中从句可分为定语从句,和句子可以分为简单句,并列句复合句词性从句和状语从句。 用来修饰谓语动词,其他动词,定语,状语或整个句子的从句叫做状语从句。状语从句可分为:时间状语从句、地点状语从句、原因状语从句、条件状语从句、目的状语从句、让步状语从句、比较状语从句、方式状语从句、结果状语从句。 DaMing is a brave boy. DaMing is a brave boy and he always does something special. DaMing is a brave boy, who always does something special.

可编辑word 资料收集于网络,如有侵权请联系网站删除二,时间状语从句 When, while, as, before, after, since, 引导时间状语从句的连接词一般有等。,until/tillas soon as When 观察下面例句,总结其用法 1.When he was a child he was always trying out new ideas. 他小时候就常常试验一些新的设想。 2. When she came into my room, I was just reading a book. 她走进我房间时,我正在看书。 3. Were you writing when the teacher came in? 老师进来的时候,你在写信吗? 4. Sorry, I was out when you called me. 对不起,你打电话来的时候我出去了。 总结:从句表示动作可以______________也可以_________________,主句和从句的先后关系_______________________________________ When从句一般用于过去时比较多,主句无时态限制。 练习 Eg: When I got to the airport, the guests had left. 当我赶到飞机场时,客人们已经离开了。 可编辑word 资料收集于网络,如有侵权请联系网站删除When he had finished his

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