as英语用法归纳
下面是小编归纳的一些关于as英语用法， 希望对大家的英语学习有帮助。
一)as作介词。
1.作“如，像”解。eg：
They got united as one man.他们团结得像一个人一样。
作“充当，作为”解。eg：
As a writer，he was faMous.作为作家，他是很有名的。
二)as作副词，表示程度，意为“同样地”。在“...”，“not ...”结构中的第一个as是副词，作“和/与...(不)一样”解。eg：
Jack is as tall as his father.杰克和他的父亲一样高。
He doesn't speak English as/so fluently as you.他的英语说得不如你流利。
三)as作连词，常用来连接主句和状语从句。
1.引导时间状语从句，作“当...的时候”解，有“随着...”之意，与while意义相近，强调两个动作同时发生;或某事一发生，另一事立即发生。eg：
He shouted aloud as her ran along.他一边往前跑，一边高声地呼喊。
I was startled as he opened the door.他一开门，我吓了一跳。
as作连词，相当于when。eg;
As a little boy (When he was a little boy)he began to learn to play piano.他小时候就开始学弹钢琴。
2.引导原因状语从句，作“因为，由于”解，与because的用法相近。eg;
I must stop writing now，as I have rather a lot of work to do.我必须停笔了，因为我还有许多工作要做。
3.引导方式状语从句或比较状语从句，作“正如，(如)像”解。例eg：
As in your country，we grow wheat in the north and rice in the south.正如(像)你们国家一样，我们在北方种小麦，在南方种大米。(方式状语从句)
When at Rome，do as Romans do.入乡随俗。(方式状语从句)
4.引导让步状语从句，作“虽然，尽管”解。这时从句常用倒装语序，即把从句中的表语、状语或动词原形放在as之前。eg;
Strange as it may seem，it is true.尽管这事看上去很奇怪，但却是真的。
Try as he might，Tom could not get out of the difficulties.不管怎样努力，汤姆还是摆脱不了困境。
四)as作关系代词。
1.引导限制性定语从句，用在“”,“the ”，“”等结构中，常译作“像...一样的人(或物)”，“凡是...的人(或物)”。例eg：
He wished to be such a man as Lei Feng was.他曾希望做一个像雷锋那样的人。
My hometown is no longer the same as it was.我的家乡再也不像过去一样了。
2.引导非限制性定语从句，用来指代它前面的整个句子(即先行句)，意思是“这一点”。这个分句可以位于句首、句中或句末。eg：
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。
五)含as的固定词组的用法
soon as作“一…就”解，引导时间状语从句。eg：
As soon as I get to Beijing，I'll write to you.我一到北京，就给你写信。
long as作“只要”解，eg;
As/So long as you study hard，you'll make progress.只要你努力，你就会取得进步。
if/though常用来引导方式状语从句，作“好像，仿佛”解。如果从句中讲的是非真实情况，则用虚拟语气。eg：
She loves the child as if/though he were her own.她爱这个孩子如同爱自己的孩子。
As if/though也可用来引导表语从句，常用在“It appears/looks/seems...+as if/though”句型结构中。eg;
It appears as if/though it is going to clear up.看起来天要晴了。
It seems as if/though he knew nothing about it.他好像对此事一无所知。
to作“关于，至于”解。eg;
There is no doubt as to his honesty.他的诚实是无可置疑的。
much/many as作“多达...”，“达到...之多”解。eg：
He can earn as much as 5000 dollars a month.他每月能挣5000美元。
far as I know作“就我所知”解，在句中作插入语。eg：
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。
a result，as a result of表示“由于...的结果”。eg：
She died as a direct result of the accident.她的死是那次事故的直接结果。
8，as well为“也，还”之意。eg：
Come early，and bring your brother as well.早点来，把你的弟弟也带来。
as to， to若跟动词原形，表示目的或结果。eg：
He studied hard so as to pass the exam.他努力学习以便通过考试。(表示目的)
as……as
AS +adj(原级)+AS
AS +adv(原级)+AS
as soon as 一……就
as soon as possible 尽可能快地
as early as possible 尽可能早的
as carefully as you can 尽可能认真地
as careful as you can 尽可能认真的
一般用于否定句, 一般用于肯定句,(肯定否定都能用)
不可用于肯定句与均可表示"与……一样",...的用法:两个as中间可以加形容词或者副词,由它要修饰的内容决定.
它们的用法有异同之处:
肯定句用,不用;否定句两者均可使用.例如:
I didn't go as /so far as you.我走得不像你那么远.
They walked as far as the station.他们步行到了车站.
误:They walked so far as the station.
