在英语中，同一个单词通过不同的组合有很多种意思，今天个大家介绍的是as...as，和as的不同的组合
as...as的结构
as + 形容词或副词原级 + as
1）在否定句或疑问句中可用so… as。
He cannot run so/as fast as you.
2）当as… as 中间有名词时采用以下格式。
as +形容词+ a +单数名词
as + many/much +名词
This is as good an example as the other is.
I can carry as much paper as you can..
3）用表示倍数的词或其他程度副词做修饰语时，放在as的前面。
This room is twice as big as that one.
Your room is the same size as mine.
4)倍数+ as + adj. + as<=> 倍数+ then + of
This bridge is three times as long as that one.
This bridge is three times the length of that one.
Your room is twice as large as mine.
Your room is twice the size of mine.
1.as作连词,引状从。
1)表"当......时候",引时状从,强调两个动作同时发生,或某事一发生,另一事立即发生。
如：She sang a song as she walked. 她边走边唱着一首歌。
2)表"因为"、"由于",引原状从，与because相近。
如：I must stop writing, as I have a lot of work to do. 我必须停笔,因为我有许多工作要做。
3)表"正如"、"按照""像......一样",引方式/比较状从。
如：Run as l do. （方状从)/My brother is as tall as I am. 我弟弟和我一样高。(比较状从)
4)as经常用在as... as possible结构中,表示"尽可能地......"。
如：as quickly as possible尽可能快,as much as possible尽可能多。
5)表"尽管"、"虽然",常用于倒装句式,引让步状从。
如：Old as he was, he still worked very hard. 他虽然年龄大了,但工作还很努力。
6）as用作介词，表"充当"、"作为"。
如：As a party member, I must be strict with myself. 作为一名党员,我必须严格要求自己。
She is famous as a singer. 她作为一名歌手而闻名。
as构成一些固定搭配。
1.as well as 同,和......一样;
如: My parents often go for a walk after supper as well as my brother. 我父母经常晚饭后散步,我哥哥也是。
2.as soon as 意思是"一......就......",引导一个时间状语从句。如：
I'll call you as soon as I finish my homework.我一完成我的作业,就给你打电话。
I will call you as soon as I get to the station.我一到车站就会给你打电话。
3.as long as 意思是"长达......之久；只要......"。
如：She has searched the information about dinosaurs on the Internet as long as three hours. 她在因特网上搜索有关恐龙的信息已经长达三个小时。
如：As long asyou don't betray me, I'll do whatever you ask me to (do). 只要你不出卖我，要我做什么我都愿意。
4.as much as
意思是"高达......；与......一样多"。是用来表达极其多的语气。如：Some of the stones weigh as much as fifteen tons.有些石头重达15吨。
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