1、 1 连词部分连词部分 连词在句中的作用是把词与词、短语与短语、句子与句子连接起来。它不能在句中单独作句子成分。 知识点概述 并列连词和从属连词的用并列连词和从属连词的用法法 连词是连结单词、短语、从句或句子的虚词, 在句子中不单独作句子成份。 连词按其性质可分为: 1并列连词 如:and, or, but, for, 等, 连接并列的词与词,短语与短语,句子与句子。 如:Rice and potatoes are common foods. (词与词) Today we can travel by plane. (短语与短语) Many trees lose their leaves in
2、winter, but evergreen trees do not. ( 句子与句子) 关联连词是一类成对使用的连词 如:bothand, notbut. not onlybut also not onlybut as well eitheror neithernor 关联连词必须后接同样的语法结构。 如:Either the windows were opened or the door was opened. 2从属连词 如:that, whether, when, because, though 等, 用以引导名词性从句和状语从句。 3从属连词引导的从句不可以被断成一个句子。 如果断开
3、,就错了。 如:When the alarm clock rang. (不完整) 4 though (although)引导让步状语从句,because 引导原因状语从句, 所以 though(although)不能和并 列连词 but ,because 不能和并列连词 so 一起使用。 只能单独使用。 二 、二 、复 习 时 需 要 注 意 的 要复 习 时 需 要 注 意 的 要 点点 (1)表示选择关系的连词,连接的双方只取其一。常用连词有 or, either.or, otherwise 例如: 1)You can go to Beijing either today or tomor
4、row 2)You must get up early or you wont catch the early bus. (2)表示转折关系,连接的双方构成对比,意义上有转折。常用连词有 but, however, while, only 例如: 1) His brother is fond of football while he likes basketball. 2) You can watch TV, but you must finish your homework first. (3) 表示联合关系,联合的双方是对等的,意义上趋向一致。常用连词有:and, both.and, ne
5、ither.nor, not only.but also, as well as, together with 例如: 1) To study English well, we need both diligence and careful. 2) That horse is not only the youngest among the five, but also runs the fastest. (4)表示因果关系,连接的双方,互为因果,或者前因后果,或者前果后因。常用的连词有:for, so, therefore 例如: 1) It must have rained, for the
6、 ground is wet. 2 2) You are in the right, therefore they should support you. 实战演练 一、例题选一、例题选讲讲 例 1 he did not know much English,he got out his dictionary and looked up the word. A As B For C Since D Because 答案: A 提示: for,because 和 as 虽皆可作连词用,表示“因为”,但用法有些区别。for 引导的分句总 是置于另一分句之后, 常常对前一分句加以解释, 两个分句之间,
7、 总是用逗号分开。 because 引导的原因状语从句时,往往以 why 问句,语气比较重,传递的往往是对方未了解的新 信息。 as 引导的原因状语从句时, 往往是对方也知道的信息。 本句是他拿出词典查, 显然, “他知道的英语单词不多”,这是明摆着的事,所以用 as 最恰当。 例 2 you dont feel well,youd better stay at home A Because B Since/If C For D Now 答案: B 例 3 I dont know he has received the package. A if B when C what D how man
8、y 答案: A 提示: if 表示是否,when 不能与现在完成时连用。 例 4 Come tomorrow, I will give it to you. A or B and C though D if 答案: B 提示: and 在此处解释为“那么”,表示递进关系。 例 5 The teacher his students likes football. A and B as well as C and also D also 答案: B 提示: as well as 连接两个主语用靠前原则。 3 例 6 We were having lunch some one knocked at the door. A as B a soon as C when D while 答案: C 提示: when 在这里解释“就在那时”