我们都知道,as这个词特别常见。学好as用法,也就是正确理解as的用法,直接关系到我们阅读能力的提升。那么,它到底有哪些用法呢?我们今天进行第1讲。

as 用法归纳(对as用法的正确理解关系到阅读能力的提升)(1)

as用法第1讲

首先,as可以作介词

as作介词用以表示“以...身份”或“当作”,后面跟有表示身份、职业、地位、人的特征的名词作宾语。

例如:

He worked as a slave.(He was a slave.)

He spoke as a lawyer.(He was a lawyer.)

比较:

He worked like a slave.(He was not a salve.)

He spoke like a lawyer.(He was not a lawyer.)

作介词的as常用来引入补足语:

(1)宾语补足语

例如:

They regarded him as their leader.

He looked upon it as certain.

I don't regard you as being dangerous.

We consider the writer as disconnected.

注:如果补足语是形容词或-ed分词,一般认为前面省略了being。

(2)主语补足语

例如:

The report was considered as false.

He is better known all over the world as Mark Twain.

常用语这一类结构的动词有如下一些:

acknowledge,define,describe,express,look upon,recognize,refer to,represent,serve,think of,treat,view,use等。

as 用法归纳(对as用法的正确理解关系到阅读能力的提升)(2)

as用法第2讲

其次,as可用作副词

(1)表示同等程度、数量、质量等作“一样地......”解释。

例如:

He runs fast,but I run just as fast.(=I run just as fast as he does.)

Tom has a lot of money but I don't have as much.(=I don't have as much as he does.)

(2)用在形容词或-ed分词前。

例如:

man as different from other animals

man as described by scientists

as 用法归纳(对as用法的正确理解关系到阅读能力的提升)(3)

as用法第2讲

再次,as可用作关系代词

(1)在the same...as“像......一样的......"和such...as”像......那样的......”结构中,as引导限制性形容词从句。

例如:

He is just the same as he used to be.

Such passengers as survived the explosion were drowned.

(2)as(=which)引导的非限制性形容词从句,可以出现在句首、句中或句尾。

例如:

She is a teacher,as is clever from her manner.

Water,as is known to all,is a liquid.

类似as you know的从句还有:

as everybody knows,as I see,as I have said,as I am told,as you may remember,as you may have heard,as you say等。

注意:区别形容词从句as seems和副词从句as it seems:

例如:

He is the best candidate,as seems possible.(as指主句)

He is the best candidate,as it seems.(it指主句)

as 用法归纳(对as用法的正确理解关系到阅读能力的提升)(4)

as用法第2讲

小结:以上是关于as的三大用法小结,分别从as用作介词、副词和关系代词三个方面进行了小结,希望大家能够认真复习巩固。咱们下一期接着as用法的第2讲内容。

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