2020年中考英语一轮复习连词用法讲解(含答案)

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1、中考英语连词用法讲解Step 1 language point1、连词的含义:连接词与词、短语与短语、或引导从句的词叫连接词。2、连词的分类:连词分为并列连接词和从属连接词两种。(1)并列连接词连接并列的词、短语、从句或句子。常见的并列连接词有:and(和),but(但是),or(或者,否则),nor(也不), so(所以), however(然而,无论如何),for(因为),still(可是),as well as(也),both.and.(和), not only .but also.(不但而且), either or(或或),neither nor(既不也不)等。(2)从属连接词用于引导

2、从句,常见的从属连接词有:when(当时候),while(正当时候),after(在之后),before(在之前),since(自从),until(直到),although/though(虽然),if(假如),as(如一样;由于),as as(和一样),as far as(就而言),as long as(只要),as soon as(一就),even if(即使), because(因为),unless (除非),than(比),whether (是否),in order that(为了),sothat(如此以致),so that(以便),now that(现在既然),by the time(

3、到时候),every time(每当),as if(仿佛),no matter when(或whenever)(无论何时),no matter where(或wherever)(无论在哪里)等。从属连词可引导状语从句。辨析(1)because、as、since、for的用法:because(因为)表示原因的语气最强,常表示必然的因果关系,从句一般放在主句后面;回答why的问句只能用because. as(因为)表示一般的因果关系,语气比because弱,说明比较明显的原因,它引导的从句可以放在句首也可以放在句尾。since(既然)表示对方已经知道、无需加以说明的原因或事实。for(因为)是并列

4、连词,语气较弱,用来补充说明理由或提供一种解释。如:He is not at school today because he is seriously ill. As all of you have got here, now, lets go to the zoo. I will ask Lin Tao to go with me since you are very busyWe must be off now for the match starts at 7:00. (2)if、whether的区别:表示“是否”时,if和whether同义,引导宾语从句,另外,whether还可以引导

5、主语从句、表语从句(以及同位语从句)等名词性从句或者让步状语从句;而if还可以表示“如果”,引导条件状语从句,(主句与从句遵循主将从现的原则)。如:I dont know if/whether he will arrive on time.我不知道他是不是会按时到。I will ring you up if he arrives on time.如果他按时到达我会给你打电话的。 注意下列情况只能用whether不能用if:引导主语从句,引导表语从句,引导从句作介词宾语,引导不定式短语,引导让步状语从句,在动词discuss之后,在wonder / not sure之后,在if与whether含

6、义易混时。如:Whether it is a fine day next Sunday is still a question. (引导主语从句) Please ask him whether to go there with a raincoat or not. (作动词的宾语) Hainan is the place to be, whether its summer or winter. (引导让步状语从句)Please let me know whether you need my help. (引导宾语从句)(如果换成if则还可能表示“如果你需要我的帮助请告知”)(3)while、w

7、hen、as的用法区别:while常表示一个较长的动作,它引导的从句动作与主句的动作是同时发生的、是平行的;when可以表示较短的动作也可以表示较长的动作,主句和从句的动作可以同时发生也可以先后发生;as与上两词同义,可替换while和when, 表示主句和从句的动作同时发生,常译为“一边一边”。如:Please do not trouble me while I am writing my homework. Ill go home when I have finished my job. They were running quickly across the road when they

8、 heard the sound of a truck coming.As we walked in the dark street, we sang songs and talked loudly. (4)till/until与nottill/until的区别:前者表示一个延续性的动作,后者表示一个才开始的动作。如:I will stay here and watch the baby until you return. (stay这个动作一直进行到你return) They wont go on working until they get what they think is reaso

9、nable. 另外till与until基本可以互换,但是在句首时只能用until,不能用till. 如:Until the last minute of the match we kept playing. Not until he had finished his work did he go home.(倒装句)(5)though与although的区别:两个词都表示“虽然”,均不可以与but同时使用,但在句中可加still或yet连用。although“尽管、虽然”仅作连词,比较正式,一般可以换为though; though“虽然、尽管、即使”,还可以与even连用(=even if),

10、表示“即使、纵然”,作副词时意思是“然而、不过”,不能放在句首。如:He passed the exams although illness prevented him from going to classes.she wont leave the TV set,even though her husband is waiting for her for the supper.It was a quiet party. I had a good time, though.(6)prefer torather than与preferto的区别:prefer torather than后面都是用

11、动词原形,preferto都是用动名词或名词。如:I prefer English to Japanese. /I prefer to learn English rather than learn Japanese. 定义:修饰谓语动词或某个句子的“词,短语,句子”;用来说明谓语动词发生的时间、地点、方式、因果、条件、让步、目的、程度等。2、什么可以作状语:1)副词(短语)作状语:The boy needs a pen very much./男孩非常需要一支钢笔。(程度状语)The boy really needs a pen./男孩真的需要一支钢笔。(程度状语)The boy needs

12、a pen now./Now,the boy needs a pen./男孩现在需要一支钢笔。(时间状语) 2)介词短语作状语:In the classroom,the boy needs a pen./在教室里,男孩需要一支钢笔。(地点状语)Before his mother,Tom is always a boy./在母亲面前,汤姆总是一个男孩子.(条件状语)On Sundays,there is no student in the classroom./星期天,教室里没有学生.(时间状语) 3)分词(短语)作状语:He sits there,asking for a pen./他坐在那儿

13、要一支笔。(表示伴随状态)Having to finish his homework,the boy needs a pen.因为不得不完成作业,男孩需要一支笔。(原因状语)Frightened,he sits there soundlessly./(因为)受了惊吓,他无声地坐在那儿。(原因状语)4)不定式作状语:The boy needs a pen to do his homework./男孩需要一支笔写家庭作业。(目的状语)To make his dream come true,Tom becomes very interested in business.为实现梦想,汤姆变得对商业很有

14、兴趣. 5)句子做状语:He had learned a little Chinese before he came to China.在他来中国之前,他已经掌握了一些中文。二、 状语从句的分类1. 时间状语从句(1)时间状语从句常用when, as, while, before, after, since, till, until, as soon as等连词来引导。例如:It was raining hard when we got to school yesterday.While he was doing his homework, the telephone rang.As he w

15、alked along the lake, he sang happily.He had learned a little Chinese before he came to China.After he finished middle school, he went to work in a factory.(2)在时间状语从句里,通常不用将来时态,用现在时态表示将来的动作或状态。例如:Ill ring you up as soon as I get to New York.I will tell him everything when he comes back.He wont believe it until he sees it with his own eyes.(3)在带有till或until引导的时间状语从句的主从复合句里,如果主句用肯定式,其含义是“一直到时”,谓语动词只能用延续性动词。如果主句用否定式,其含义是“直到才”, “在以前不”, 谓语动词可用瞬间动词。例如:The young man read till the light

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