2023年初中英语语法：条件状语从句考点分析.docx

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1、2023年初中英语语法：条件状语从句考点分析条件状语从句的概念简述在复合句中，由从句表示的状语叫做状语从句。由连接词if或 unless引导的状语从句叫做条件状语从句。在复合句中，由从句表示的状语叫做状语从句。它可以用来修饰 主语中的动词.形容词.副词等。根据它表达的意思，状语从句可以分 为时间状语从句，地点状语从句，条件状语从句，比较状语从句，目 的状语从句，结果状语从句和让步状语从句等。由连接词if或unless 引导的状语从句叫做条件状语从句。（注意：在含有条件状语从句的 复合句中，如果主句是一般将来时态，从句要用一般现在时主将从 现原则）条件状语从句的语法：e. g. If youre

2、 not satisfied with the life youre living, dont just complain. Do something about it. 对于现况的不满, 不能只是抱怨，要有勇气作出改变。If youre lonely when youre alone, youre in bad company.-Jean Paul Sartre 如果你独处时感到寂寞，说明没有 把自己陪好。条件状语从句就是用以表示“在某种条件下，会”常用if , in case , on condition等词来引导连接词 主要有 if, unless, as/so long as, on

3、condition that, provided, suppose, supposing 等。.主句用一般将来时，if或unless引导的条件状语从句用一般现 在时。固定搭配：unless = if. not.e.g. Lets go out for a walk unless you are too tired.If you are not too tired, lets go out for a walk.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，叙述真实可能发生的事情，例如：They get angry if they think they are being trea

4、ted disrespectfully. 他们要是觉得受到了怠慢，就会大动肝火。非真实条件句是虚拟语气的一种，表示与事实相反，例如：If I were you, I would go with him.如果我是你，我就跟他 走。由 as (so) long as, in case 弓I 导。The president need not step down so long as the elections are held under international supervision. 只要选举在国际监 督下进行，总统就不用下台。He paused enough to consider the

5、 options but never so long as to lose the initiative. 他停顿了一会儿权衡自己有哪些选 项，但并没有久到丧失主动权。She had had the foresight to prepare herself financially in case of an accident. 她有先见之明，经济上作了准备以防万 一发生事故。特殊词引导的条件状语从句条件状语从句和其他从句一样，学好的关键都是掌握好引导词， 然而除了常规引导词以外，还存在着一些特殊引导词，掌握好这些引 导不仅能让你的英语水平更上一层楼，也能让你的日常交流表达更加 地道。suppo

6、se 和 supposing：suppose和supposing可用作连词，引导条件状语从句，其意为 “假若”“如果”等；此时主句通常为疑问句。eg. Supposing he can t come, who will do the work? 假使 他不能来，这工作谁做？Supposing he does not come, shall we go without him?如果他不来，是不是不带他去？Suppose you were given a chance to study in America, would you accept?假如给你一个到美国学习的机会，你 会接受吗？Suppo

7、se Supposing (that) we miss the train, what shall we do?假如我们误了火车，我们将怎么办？provided 和 providing：虽然providing和provided形式上为动词provide的现在分 词和过去分词，但它们均可用作连词，引导条件状语从句，其意为“只 要” (=as long as)、“如果(=if)等。eg. Providing Provided you clear your desk by this evening, you can have tomorrow off,只要你到今晚把案头上的工 作做完，你明天就可以休

8、息。Providing Providing you promise not to tell anyone else. I 11 explain the secret.只要你保证不告诉任何 人，我就把这个秘密讲给你听。Provided Providing that you keep quiet, you can come to the concert.只要你保持安静，你就可以去听音乐会。Providing there is no opposition, we shall hold the meeting here.如果没人反对我们将在这里开会。这类从句通常置于主句之前，但置于主句之后也是可能的。

9、eg. I will stay here provided providing the climate agrees with me.如果这里的气候合适的话，我就待下来。You can borrow my bike providing provided you bring it back.你可以借我的自行车，只要你还给我。蓄条件状语从句分析用法小结有些句子，虽没有含条件关系的连词，却也隐含着条件关系，我 们称之为含蓄条件状语从句。这些句子常用一些词，如but for, without等引出一个介词结 构来表示条件，条件应该是虚拟的，或与事实相反的假设。例如：but for若非，要不是You m

10、ay consider it useless, but for our customers it s an all-important sign of good service.您也许会认为这样毫无用处， 可是对于我们的客户而言，它却是优质服务的重要体现。The first series was really bad. But for some reason the public took to it. 第一部系列剧糟透了，可是不知为何，观众 开始喜欢上了它。Spurs could have had several goals but for some brilliant saves from

11、 John Hallworth. 要不是约翰霍尔沃思几次精彩的 扑救，热刺队原本可以射进好几个球。例如：without如果没有.就不.You cant have one without the other, as the song says. 就 像歌里唱的那样，两者密不可分，不能只取其一。In a strangled voice he said, “This place is going to be unthinkable without you. n他哽咽地说道：“没有你这个地方会 变得不可想象。”I tell you, Carrie, before God, I cant live wi

12、thout you.我告诉你，嘉莉，苍天作证，没有你我就活不下去.例如：otherwise否则We didn* t know his telephone number, otherwise we would have telephoned him.我们不知道他的电话号码，否则我们就会给 他打电话。This is the one blemish on an otherwise resounding success.如果没有这个小小的失误，这就是一次彻底的胜利。If he had done otherwise, I should have thought him a rascal.如果他不这样做，

13、我就认为他是个恶棍.条件状语从句时态条件状语从句时态根据主句决定。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；主句如果是过去的某种时态，则从 句要用过去的某种时态。条件状语常用的引导词是if和unless1、用if引导：if意为“如果”。例句：I don t know if it will rain tomorrow. But if it rainstomorrow, I 11 stay at home.不知道明天是否会下雨，但要是下 雨的话，我就呆在家里。2、用unless引导：unless的意思是“如果不” “除非”。但除了这两个以外，条件状语从句也拥有一些其他的引导词，这

14、些引导词出现频率较低，用法偏复杂，所以不如if和unless知名度 那么高。1. on condition (that). .在条件下eg. I can tell you the truth on condition that you promise to keep a secret.You can eat ice cream on condition (that) you wont eat too much.2. supposing conj,如果， 假如eg. Supposing it rains,shall we continue the sports meeting?Supposing

15、 anything should go wrong,what would you do then?3. provided conj.假如，除非，以为条件 provided (that)+从句表示一种假设条件。eg. He will sign the contract provided we offer morefavorable terms.He wont be against us in the meeting provided that we ask for his advice in advance.for若非，要不是eg. But for the rain,we should have a pleasant journey.But for your help,we should not have finished in time.5. in case 如果，万一eg. In case I forget, please remind me about it.6. as/so long as 只要eg. As long as you re happy, it doesn t matter what you do.As long as it doesnt rain, we can go.