文档介绍：as as的用法
其基本意思为“与…一样”，其中的第一个as为副词，其后通常接形容词或副词(用原级)，第二个as可用作介词(后接名词或代词)或 连词(后接从句)。使用时应注意以下几点。如：
在否定句中，第一个as也可换成S0o如：
He doesn't study as [so] hard as his 。
在该结构的两个as之间通常接形容词或副词的原级，但若涉及数量或程度，可用“asmuch+不可数名词+ as”和“as many+复 数名词+as”。如：
You've made as many mistakes as I 。
I haven't got as much money as I 。
其间接形容词时，有时该形容词还可修饰另一名词，但这个名词应带有不定冠词(注意词序)。如：She is as good a teacher as her 。
也可说。如：She is a teacher as good as her mother.
但不说。如：She is as a good teacher as her mother. / They are as good teachers as us.
第二个as后接从句时，该as通常为连词，但有时这个as还充当其后从句的主语或宾语，此时该as实为关系代词。如：
I gave him as much as he could ，我就给了他多少。
We've got food for as many people as want ，无论多少人吃都够了。
例：His room is as big as 。
He runs as fast as
as as possible 尽可能......
The red coat is as(long) as the blue one.
My sister is not so(tall) as me/I.
Mike does his homework as(carefully) as Mark.
They don't get up as(early) as We.
He runs as(fast) as she.
二、祁使句
Let's 开头的祁使句 tQ' Let's say it in English .
' Listen to the teacher .
Shall I ' Shall I carry the parcel for you ?
Will you :Will you come here early ?
以 Please 开头的祁使句 tD' Please take a message for him.
带呼语的祈使句，如：Mary, come down here !(对mary讲话，而不带呼语的且以动词原形开头的祈使句则对 第二人称讲话)
不让对方做某事，英语用n Don't".例如：
Don't sp