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1、连词连词是一种虚词， 它不能独立担任句子成分而只起连接词与词，短语与短语以及句与句的作用。连词主要可分为两类：并列连词和从属连词。并列连词用来连接平行的词、词组和分句、句子。如：and, but(但是;通常用not.but.-而是;可是,然而;表示惊讶,不同意等-喔,哇;用来加强语句重复部分的语气-一定;用来引入新话题-那就;常用于否定句-而不,若不;用于含doubt,question等字的否定句中相当于that-对于), or(或者,还是;用于否定句-也不;否则,要不然;也就是说,换言之), nor(用在neither之后-也不;用在no,not,never之后-也不;用在句首,句子需倒装-
2、也不), so(因此,所以;因而,从而), therefore(因此,因而,所以), yet(可是,却,然而), however(然而,可是,不过;无论如何,不管怎样;不管用什么方法;究竟怎样,到底如何), for(因为,由于), hence(因此,由此), as well as(不但,而且;和.一样,和,也), bothand(既.又.;不但.而且), not onlybut also(不但,而且), eitheror(不是.就是;要么.要么), neithernor(既不.也不.), (and)then(那么)等等。并列连词与并列结构 并列连词引导两个并列的句子。1)and 与or判断改错
3、：(错) They sat down and talk about something.(错) They started to dance and sang.(错) I saw two men sitting behind and whisper there.(对) They sat down and talked about something.(对) They started to dance and sing.(对)I saw two men sitting behind and whispering there.解析： 第一句： and 连接两个并列的谓语，所以 talk 应改为 ta
4、lked。 第二句：and 连接两个并列的动词不定式，第二个不定式往往省略to，因此sang 应改为 sing。 第三句：and 连接感观动词saw 后面的用作的宾补的两个并列分词结构，因此whisper应改为whispering。注意：and 还可以和祈使句或名词词组连用表示条件。（or也有此用法） Make up your mind, and youll get the chance. = If you make up your mind, youll get the chance. One more effort, and youll succeed. = If you make one
5、 more effort, youll succeed.2)both and两者都She plays (both) the piano and the guitar.3)not onlybut (also), as well as不但而且）She plays not only the piano, but (also) the guitar. 注意： not only but also 关联两个分句时，一个分句因有否定词not 而必须倒装。 Not only does he like reading stories, but also he can even write some.4)neit
6、henor 意思为既不也不谓语动词采用就近原则，与nor后的词保持一致。Neither you nor he is to blame.比较and和or 1) 并列结构中，or通常用于否定句，and用于肯定句。2) 但有时and 也可用于否定句。请注意其不同特点： There is no air or water in the moon. There is no air and no water on the moon.在否定中并列结构用or 连接，但含有两个否定词的句子实际被看作是肯定结构，因此要用and。典型例题-I dont like chicken _ fish.-I dont like
7、 chicken, _ I like fish very much.A. and； and B. and； butC. or； butD. or；and答案C。否定句中表并列用or, but 表转折。判断改错：(错) We will die without air and water.(错) We cant live without air or water.(对) We will die without air or water.(对) We cant live without air and water.表示选择的并列结构 1) or意思为否则。 I must work hard, or
8、Ill fail in the exam.2) eitheror意思为或者或者。注意谓语动词采用就近原则。 Either you or I am right.表示转折或对比 1) but表示转折，while表示对比。 Some people love cats, while others hate them.典型例题- Would you like to come to dinner tonight?- Id like to, _ Im too busy.A. and B. so C. as D. but答案D。but与前面形成转折，符合语意。而表并列的and， 结果的so，原因的as都不符合
9、句意。2) notbut 意思为不是而是 not 和but 后面的用词要遵循一致原则。 They were not the bones of an animal, but (the bones) of a human being表原因关系 1) for判断改错： (错) For he is ill, he is absent today. (对) He is absent today, for he is ill. for是并列连词，不能置于含两个并列分句的句子的句首，只能将其放在两个分句中间。2) so, thereforeHe hurt his leg, so he couldnt pla
10、y in the game.注意： a. 两个并列连词不能连用，但therefore, then, yet.可以和并列连词连用。You can watch TV, and or you can go to bed.He hurt his leg, and so / and therefore he couldnt play in the game. b. although yet，但although不与 but连用。 (错)Although he was weak, but he tried his best to do the work. (对)Although he was weak, y
11、et he tried his best to do the work.连词的误用因为连词的种类非常多，有并列连词（连接并列句），有从属连词（引导复合句），而从属连词引导的从句又可分为三类：名词性从句、定语从句和状语从句。尤其应注意的是有些连词可引导不止一种从句，具有多重功能，这往往是学习的难点，也是易混点。难点回顾：1.as可引导多种从句，如时间状语从句、原因状语从句、让步状语从句、方式状语从句、比较状语从句以及定语从句。误 Which you can see, he is always ready to help others.正 As you can see, he is always
12、ready to help others.析as引导非限制性定语从句，当正像讲。误 Do like I told you.正 Do as I told you.析like是介词； as是连词，在这里作按照讲，引导方式状语从句。误 He was reading then he was walking.正 He was reading as he was walking.析as强调两个动作同时进行，作一边一边讲。误 As he is young, he knows a lot.正 Young as he is, he knows a lot.析as引导的让步状语从句应用倒装语序，应把表语提前。2.
13、that可引导多种从句，如定语从句、名词性从句、状语从句等。误 You dont like him is none of my business.正 That you dont like him is none of my business.析that引导主语从句，本身无实际意义，但不能省略。误 The thief handed everything which he had stolen to the police.正 The thief handed everything that he had stolen to the police.析everything是不定代词，因此后面的定语从句
14、只能由that引导。误 I am happy as you passed the exam.正 I am happy that you passed the exam.析that在形容词后面引导原因状语从句，不能用as。3.where可引导多种从句，如定语从句、状语从句以及名词性从句。误 Go to find your watch. Its there where you left it.正 Go to find your watch. Its where you left it.析where引导表语从句，相当于at the place where。误 The place where there is water, there is life.正 Where there is water, there is life.析where引导地点状语从句，可以放在主句的前面，也可以放在主句的后面。误 I cant remember in which place I met him.正 I cant remember where I met him.析where引导宾语从句，不能用in which。4.what可引导感叹句、特殊疑问句、名词性从句等。误 How a
