并列句与状语从句讲解连词是一种虚词,不能在句子中单独作句子成分,在句子中只起连接词与词、短语与短语、句子与句子以及从句的作用;一、并列句与连词连接同一语法类型的词、短语或句子1. 并列连词的分类并列连词按其作用可分为表示转折对比、因果、选择和并列四大类;1 表示转折的并列连词1.but但是,可连接两个句子,用逗号隔开;也可以放在句首2.yet 然而,尽管如此,连接两个句子,用逗号隔开；也可以放在句首The car is old,yet it is in good condition.注：yet也常放在完成时句尾表示还没有,此时不是连词,注意区分;3.while 而,可是,表示转折或对比,不用加逗号Lily likes go to school by bus while linda likes go to school by bike.4.however 然而,但是,一般位于句首,单个使用后加逗号阅读完型中常见到表转折;它们连接两个意思不同,阅读中遇到要注意;2 表示因果的并列连词表示因果的并列连词有：1.for 因为①由并列连词for 引导的分句常置于句子后部,而且常用逗号与前面的分句隔开;②for 分句主要是对前一分句补充说明理由或推断原因;③for 分句不能用来回答why 问句;She can’t go to school , for she is ill in bed.2.so 所以可以连接两个句子,中间有时用逗号隔开；也可以放在一个句子的句首;例：The shop doesn't open until 11 a.m. , so we should go there later..3.therefore 因此,用法和however类似,但词义不一样3 表示选择的并列连词表示选择的并列连词有：or 或者,either…or 不是……就是……,或者……或者……注①or用在祈使句中,意为“否则”,Hurry up, or you’ll be late. 快点,否则你就会迟到了;②or用在否定句中表示并列关系;They never dance or sing. 他们从不跳舞,也不唱歌;③either…or…连接主语时,谓语动词就近原则;4 表示并列关系的连词连接主语时注意谓语表示联合关系的连词有：1.and 和,而且 and ①用在肯定句中连接并列的成分,表示“和,而且”；②用在祈使句中,意为“那么”Study hard, and you will succeed. 努力学习,你就会取得成功;2.both…and…既……又,两者都谓语动词用复数Both you and he are right.3.as well as 也注谓语动词应与as well as 前面的主语在人称、数上保持一致;I as well as he am a doctor. 我和他一样,也是医生;4.not only…but also不但……而且……它连接主语时,谓语动词就近原则;Not only I but also students are tired of take the examination.5.neither…nor…既不……也不……它们用来连接两个并列关系的词、短语或分句;它连接主语时,谓语动词就近原则.Neither you nor she has ever gone the USA. 你从来没去过那,她也没去过;注：1.祈使句中and 表示那么,or表示否则2.谓语就近原则there be,either…or…,neither…nor…,not only…but also二、状语从句与连词1 引导时间状语从句的连词：时间状语从句服从主将从现Before把我们说过的例句写下来让他们填, after, when/while/as, since自从,用于完成时+since+过去时 ,not…until, as soon as一;;就;; 等;①when和while用法区别：while：She came in 点性while I was doing延续性my homework.我正在写作业的时候她进来了;When: I was doing my homework when she came in.我正在写作业,这时他进来了;②not…until,前加点性动词;肯定句时用延续性动词③as soon as 的主将从现I’ll tell her as soon as I see her. 我一见到她就告诉她;2 引导条件状语从句的连词：条件状语从句服从主将从现①if, 如果其引导的条件状语从句表示的前提或条件可以实现或正在进行,从句用现在完成时或进行时;I will give you a good price if you are thinking of buying it.③as long as, You’ll pass the exam as long as you work harder.④unless等; You’ll fail in the exam unless you work harder.⑤祈使句+and/or+陈述句意义上相当于条件状语从句3 引导原因状语从句的连词：because, as, since, for等;注意：如果原因是人们已经知道的事实,用since引导,有既然的意思4 引导目的状语从句的连词：①so that：He put on his glasses so that he could see it clearly.②in order that ：1.与so as to 用法相同2.注意它与in order to的区别5 引导结果状语从句的词：such…that, so…that,She is so lovely a girl that we all like her.She is such a lovely girl that we all like her.注：区别当名词前有many或much修饰时,用so而不用such so much time6 引导地点状语从句的连词：where, wherever等;eg:Sit wherever you like. 请随便坐;7 引导让步状语从句的连词：though一般位于句中, although一般位于句首, even if,whatever, wherever, whenever等;Although he was tired, he kept on working. 虽然他很累,但仍继续工作;8 引导比较状语从句的连词： than, as…as, more…than…, the+比较级,the+比较级等;He doesn’t play half as well as his sister. 他演奏的水平不及他姐姐的一半;Our city is smaller than that one. 我们的城市比那个城市小;。
