关系代词AS的用法

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。 1.such.as/such as意为“.的那种.,像那样的”，such.as/such as引导限制性定语从句时,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。 You should read only such books as you can understand without much difficulty.(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) 要和能改善你的言行的那种人结交。 2.the 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 这正是我丢的那块表。 3.as(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： Its as pleasant a film as I have ever seen. 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.,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 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 in 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： 1._is known to all,China will be an and powerful country in 20 or 30 years time.(1994上海) A.That；advancingB.This；advanced C.As；advanced D.It；advancing 2._is mentioned above,the number of the students in senior high schools is increasing.(1999上海) A.It B.As C.That D.Which 3.These houses are sold at such a low price_people expected. A.likeB.as C.that D.which 4._is known to everybody, the moon travels round the earth once every month.(2001NMET) A.It B.As C.That D.What 5.There at the door stood a girl about the same height _. (2004北京春) A.as me B. as mine C.with mine D. with me 6._is reported in the newspapers, talks between the two countries are making progress.(2004北京) A. It B. As C. That D. What 7._is often the case, we have worked out the production plan.(2004江苏) A. Which B. When C. WhatD. As 8._I explained on the phone,your request will be considered at