“ａｓ”用法集锦

王号召

英语中，“as”是一个非常简单但又极其灵活的单词，与不同的词在一起产生不同的含义。同学们在平时英语学习中会经常遇到它，而且又很难掌握它，现笔者将as一词的意义及用法做一下归纳，以供同学们参考：

一、as作介词的用法：

as作介词时，译为“作为”，“好像”， 如：

She works as an interpreter in that company.她在该公司里担任翻译员。

二、as作连词的用法：

1．作“当……的时候”；“在……期间”；“随着”解，引导时间状语从句，如：

I watched her as she combed her hair.她梳头的时候，我一直看着她。

2．as作“既然”、“由于”解，相当于since或because，引导原因状语从句，常用来表示已为人们所知或显而易见的原因或理由，通常置于句首，如：

As you are not feeling well, you may stay at home.既然你不舒服，可以呆在家里。

3．as作“像”、“按照……的方式”解，引导方式状语从句。如：

You must do everything as I told you to.

4．用于as…as…或not so / as…as…中，前一个as是副词，后一个as是连词或介词，意思是“与……等同”，“是……的几倍长、几倍宽、几倍高等”，引导比较状语从句。如：

She is as good an actress as she is a singer.她当演员和当歌手都一样出色。

This desk is twice as long as that.这张桌子是那张的两倍长。

5．作“虽然”、“尽管”解，引导让步状语从句。常用倒装语序，即玜dj. / 玜dv. / 玭. / 玽. + as + 主语 + 谓语 + 主句。如：

Tired as they were, they walked on.

Child as he is, he knows a lot.(child前不用冠词)

6．通常后接be或do+主语，相当于so，如：

She is unusually tall, as / so are both her parents.她特别高，她父母也都那么高。

三、as作关系代词,引导非限制性定语从句，用来指代它前面或后面的整个句子，意思是“这

一点”，“正如、正像”，这个分句可以位于句首、句中或句末。如：

As is well known，oceans cover more than 70％ of the earth.我们知道，海洋占地球面积的百分之七十以上。

类似的短语如：as we all know, as we expected, as we imagine, as sth.shows, etc.

另外，当先行词被the same, such, so等词修饰时，常用as来引导定语从句。如：

This is so heavy a box as I cant lift.

The problem is such a difficult one as I cant solve.

Though small, the ant is as much a creature as all other animals on earth.尽管蚂蚁很小，但它和地球上所有其它动物一样都是生物。此句中的第二个as 引导一个非限制性定语从句，并在从句中作表语。creature 作先行词，并被as 修饰，所以定语从句要用as引导。

四、as 与其他词构成的一些短语和固定搭配：

1．as for / to 至于某人某事物

As for/to you, you ought to be ashamed of yourself.至于你，你应该感到惭愧。

2．as if / though 意为“似乎，好像，仿佛”，引导方式状语从句，当与事实一致或有可能发生时，后边状语与其前的谓语动词一致，若与事实相反或很难发生时，后边的状语从句要用虚拟语气。如：

He acts as if / though he knows you.(他很可能认识你)

He acts as if / though he knew you.(他根本不认识你)

He behaved as if / though nothing had happened.他表现的好像什么都没发生似的。（其实已经发生了事）

It seems as if / though he knew nothing about it.他好像对此事一无所知。

3．as it is事实上；看样子，如：

We were hoping to have a holiday next week—as it is, we may not be able to get away.我们原来盼望着下星期放假——看样子走不了了。

4．as far as… 远到，as long as… 长达，as many/much as多达……，达到……之多，如：

He can earn as many as 5，000 dollars a month.他每月能挣5000美元。

5．So / as far as I know或as far as Im concerned作“就我所知”解，在句中作插入语。如： As/So far as I know，he will come here next Monday.据我所知，他将于下星期一到这里来。

6．as a result，表示“结果如何”，as a result of表示“由于……的结果”。如：

He didnt study hard, as a result, he failed the exam again.他学习不用功，结果又没通过考试。She died as a result of the accident.她的死是那次事故的直接结果。

7．as well为“也，还”之意。一般置于句末，相当于“too”，如：

Come early, and bring your brother as well.早点来，把你的弟弟也带来。

8．as well as 为“既，又，而且”之意，连接前后两个并列成分，如：

He grows flowers as well as vegetables.他既种花又种蔬菜。

9．so as (not) to, so…as (not) to, 后跟动词原形，表示目的或结果，不能置于句首。如：

He studied hard so as to pass the exam.他努力学习以便通过考试。(表示目的)

He studies so hard as to pass the exam.他学习如此努力，以至通过了考试。（表示结果）

10．not so much as 意思是“与其说是……倒不如说是……”，如：

He is not so much a teacher as a businessman.与其说他是个教师，倒不如说他是个商人。