在定语从句中AS的用法

在定语从句中AS的用法
在定语从句中AS的用法

在定语从句中AS的用法
由as,which 引导的非限定性定语从句,as和which可代整个主句,which相当于and this或and that.1)As一般放在句首,which在句中.2) as也可在句中往往和see,know,expect等词连用.
a.He seemed not to have grasped what I meant,which/and this greatly upsets me.
b.The sun heats the earth,which/and this is very important to us.
c.As was expected,the beautiful girl married a handsome boy.
d.As we all know,smoking is harmful to one's health.
e.He must be from Africa,as can be seen from his skin.
定语从句中若先行词前有the same,such作修饰语,通常用as作关系代词.
He used such expressions as he could find in the texts.
They stayed for the night in the same room as they had once rented.
such…as和such..that
such…as定语从句,as在从句中可以作主语,宾语,表语；such…that引导结果状语从句,that不充当任何成分,只起到连接作用,如：
They talked in such simple language as children could understand.
They talked in such simple language that children could understand it.
the same…as和the same…that
两者都可以引导定语从句,但the same…as指两件事物,而the same…that指同一件事物：
He is using the same pen as I did 10 years ago.
他用的这支钢笔和我十年前用的那支一个样.
He is using the same pen that I did 10 years ago.
他用的这支钢笔就是我十年前用的那支.

由as, such...as, the same...as等引出定语从句。
I shall use the instrument in such a way as he used it yesterday. 我将按他昨天使用(该仪器)的方法来使用该仪器。
Each atom normally has the same number of electrons revolving ...

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由as, such...as, the same...as等引出定语从句。
I shall use the instrument in such a way as he used it yesterday. 我将按他昨天使用(该仪器)的方法来使用该仪器。
Each atom normally has the same number of electrons revolving about the nucleus as it has protons in the nucleus. 通常每个原子内绕原子核旋转的电子数和原子核内的质子数相同。
As is reported in today's newspaper, the two countries have signed the treaty of peace and friendship. 据今天报纸报导，这两个国家已签署了和平友好条约。
注意：单个as引出非限制性定语从句时，as在从句中作成分，本身代替主句整个意思，翻译时，一般可译为"正如……那样" 。同时，这种as从句的位置比较灵活，既可置于句首或句末，也可插到句中；若插到句中，要用逗号将其与主句隔开。

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as→在定语从句中做主语或宾语→用来指人或指物。
such…as… 如此像…，这样的像…，像…一样
the same…as… 相同的…，像…一样
例句：你们正在唱的那样的歌很流行。
Such songs as you’re singing are popular now.