《中考英语总复习》中考英语总复习专题六连词课件20190403338.pptx

专题六专题六连词连词语法系统梳理一二三用于连接单词、短语、从句或句子的词叫连词。连词是虚词,在句中不能独立充当句子成分,只起连接作用。一、并列连词并列连词可分为表示转折、因果、选择和并列关系的四大类。1.表顺承、并列关系的并列连词and“和”,表并列或顺承。Work hard,and youll make great progress.努力学习,你会取得很大的进步。语法系统梳理一二三2.表示转折关系的并列连词常见的表示转折关系的并列连词有while,but,yet等,用来连接两个意思不同甚至相反的词、短语或分句。I was born in Tianshui while I grew up in Lanzhou.我出生在天水,然而在兰州长大。He wants to go,but his sister wants to stay.他想走,但他妹妹想留下。3.表示因果关系的并列连词常见的表示因果关系的并列连词有so,for等。The boss called me just now,so I must go to the office at once.老板刚才打电话找我,因此我必须马上去办公室。I must be away for a week,for Ill fix the machine for a factory.我必须离开一周,因为要为某一个工厂修机器。语法系统梳理一二三4.表示选择关系的并列连词or表示“或者”,表示选择关系。Would you like tea or coffee?你想喝茶还是咖啡?注:(1)or用在“祈使句+or+句子”结构中,其中or在此意为“否则”。Study hard,or you will fail in the exam.努力学习,否则你就不会通过这次考试。(2)or用在否定句中代替and表示并列关系。He cant read or write.他既不会读也不会写。语法系统梳理一二三5.表示并列关系的复合并列连词常见的表示并列关系的并列连词有:not only.but also.,as well as,both.and.,neither.nor.,either.or.,它们用来连接两个并列或对称关系的词、短语或分句。在否定句和疑问句中,常用or,而不用and表示并列关系。We should not only be cautious but also be brave.我们不仅应该谨慎而且应该勇敢。Paul is a writer as well as a teacher.保罗既是一位作家又是一位教师。Both you and she are right.你和她都对。语法系统梳理一二三Neither you nor I am from Australia.你和我都不是来自澳大利亚。Come to see Tom either today or tomorrow.今天或明天来看汤姆吧。注:(1)not only A but also B中,强调的对象是B(谓语动词与B保持一致);而在句型A as well as B中强调的对象是A(谓语动词与A保持一致)。(2) either.or意为“不是就是;或者或者”。动词与邻近的主语保持一致。Either you or he has to go.=Either he or you have to go.不是你就是他得去。(3) both.and.表“和都”,两部分都是主语。语法系统梳理一二三二、从属连词从属连词通常引导一个从句,修饰主句。一般可分为引导名词性从句(主语从句、宾语从句或表语从句等)的从属连词和引导状语从句的从属连词。1.引导名词性从句的从属连词主要有that,if(是否),whether(是否),when等。It hasnt been decided when the sports meeting will be held.运动会什么时候举行还没定。(引导主语从句)I dont know if he will come tomorrow.我不知道他明天是否来。(引导宾语从句)The problem is that I dont have enough money.问题是我没有足够的钱。(引导表语从句)语法系统梳理一二三2.引导状语从句的从属连词有很多,其类型见下表: 语法系统梳理一二三语法系统梳理一二三语法系统梳理一二三三、不能连用的三组连词1.because(因为),so(所以)不能同时出现在一个句子里,只能用其一。Because Nick was tired,he couldnt walk there.=Nick was tired,so he couldnt walk there.因为尼克累了,所以他不能走到那儿了。2.(al)though(虽然),but(但是) 不能同时出现但though和yet可以同时出现在一个句子里(yet用作副词)。Though Tom was tired,he still worked hard.=Tom was tired,but he still worked hard.虽然汤姆累了,但他仍然努力工作。语法系统梳理一二三3.unless(除非),or(否则)不能同时出现在一个句子里,只能用其一。Unless you try your best,you cant finish this difficult task.=Try your best,or you cant finish this difficult task.除非你尽力,否则你不能完成这项困难的任务。