关系代词AS的用法

1、关系代词AS 的用法关系代词as 引导定语从句时， 既可以单独使用， 也可以与其他词连用，其用法要比that和 which 更为复杂。同学们要下点功夫哦!AS作关系代词 , 可以用来引导定语从句: 限制性定语从句和限非制性定语从句一、 AS 引导限制性定语从句AS 引导限制性定语从句时, 通常和such,the same,as(so)等连用 , 构成如下结构:such.as/such as,the same.as/the same as, as(so).as等结构 , 在从句中可作主语 , 宾语和表语。.as/such as意为“ .的那种 .,像那样的”， such.as/such as引导

2、限制性定语从句时 , 既可指人 , 也可指物。 such 用于名词之前时 , 具有形容词性质； such 单独使用 ( 即后面不接名词 ) 时 , 具有代词性质。Dont trust such men as praise you to your face.(as作主语 )不要相信那种当面吹捧你的人。Youshouldreadonlysuchbooksasyoucanunderstandwithoutmuchdifficulty.(as作宾语 )你应当只读那些你读起来不太难懂的书。Associate with such as will improve your manners.(as作主语 )要

3、和能改善你的言行的那种人结交。same.as/the same as意为“与 .同样的” , 和 such 一样 ,the same既有形容词作用, 又有代词性质。We have arrived at the same conclusoin as they have.(as作宾语 )我们已得出和他们同样的结论。比较 :the same.as和 the same.that不同 , 前者是“同那一个相似”, 后者是“正是那一个”。如：This is the same watch as I lost.这同我丢的那块表一样。This is the same watch that I lost这正是我丢

4、的那块表。(so).as意为“和 .一样” , 后接由many,much 等修饰的名词或由形容词修饰的单数名词 , 注意其语序为as(so)+adj.+a+n+as,如： It s as pleasanta filmas I have everseen.这是一部和我以往看的同样好的电影。As many soldiers as marched were killed.很多游行的战士都被杀了。注意 :such .as与 such.that ,so.as与 so.that的区别 : that是连词 , 引出结果状语从句 , 在从句部分不作成分 ;as 是关系代词 , 引出定语从句 , 在从句中可作主

5、语 , 宾语和表语。比较 :He is such a nice boy that everyone likes him.He is such a nice boy as everyone likes.It is so difficult a problem that nobody can work it out.It is so difficult a problem as nobody can workout.二、 AS引导非限制性定语从句AS 引导非限制性定语从句时 , 通常指的不是主句中的某一个名词( 先行词 ),而是指整个主句表达的内容 , 对主句所作的陈述进行附加说明, 意为“这 .

6、,如 .或正如 .”。这种从句可位于主句之前, 之中或之后。As we all know,Taiwan belongs to China.Taiwan,as we all know, belongs to China.Taiwan belongs to China,as we all know.一些带有 as.as结构的常见短语归纳：as busy as a bee像蜜蜂一样忙碌as easy as ABC 像 ABC一样容易as deep as a well像井一样深as light as a feather像羽毛一样轻as soft as butter像黄油一样软as rich as a

7、Jew像犹太人一样富裕as is well discussed正如已讨论过的as is often said正如通常所说as is often the case通常就是这样as has been pointed正如所指出的那样as has been said before如上所述as often happens如同经常所发生的那样as might be expected正如所料as is well known to all众所周知在多数情况下 , 从句中的谓语助动词可以省略as explained before如前面所解释的as mentioned above如前面所提到的as shown i

8、n the figure如图所示as seen from the table从表中可以看出as already discussed正如已讨论过的高考题精选：known to all,China will be an and powerful country in 20 or 30 yearstime.(1994 上海 )； advanced； advanced ； advancingmentioned above,the number of the students in senior high schools is increasing.(1999 上海 )houses are sold a

9、t such a low price_people expected.known to everybody,the moontravelsround the earthonce every month.(2001NMET)at the door stood a girl about the same height _. (2004 me B. as mine北京春 )mine D. with mereported in the newspapers, talks between the two countries are making progress.(2004 北京 )A. It B. As C. That D. Whatoften the case, we have worked out the production plan.(2004江苏 )A. Which B. When C. WhatD. Asexplain