as的使用方法与分类
在英语语句中经常出现as的单词，那么as要如何正确使用呢?以下是由小编整理关于as的用法的内容，希望大家喜欢!
as的用法
一、 as作连词的用法:
1. 作"当……的时候",引导时间状语从句。注意与when、 while的用法区别。
① when作"当……的时候"解,可以指较短的(一点)时间,也可指一段时间。如:
When he was at college, he could speak several foreign languages.
When the clock struck twelve, all the lights in the street went out.
② while常表示一段较长的时间或一个过程,强调主句谓语动词与从句谓语动词同时发生。如:
Work while you work. Play while you play.
③ 但属下列情形时,只用as, 而不用when或while。
A) 用于表示同一个人的两种动作交替进行,指"一边……,一边……"。如:
The girl dances as she sings on the stage.
He looked behind from time to time as he went forward.
B)表示两个同步发展的动作或行为,译为"随着……"。如:
As time went on / by, she became more and more worried.
As children get older, they become more and more interested in the things around them.
C)表示两个短促行为或事件几乎同时发生。如:
I thought of it just as you opened your mouth.
Just as the flying worm hit her face, she gave a loud cry.
D) 后接名词表示某一年龄段时,用as。如:
As a young man, he was active in sports.
2. as=since, 作"既然"、"由于"解,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。如:
As / Since you're not feeling well, you may stay at home.
As he wasn't ready in time, we went without him.
3. as=in the way that, 作"像"、"按照……的方式"解,引导方式状语从句。如:
He speaks English as Americans do.
Remember, you must do everything as I do.
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,引导比较状语从句。如:
They helped the old man as often as possible.
I don't speak English so/ as well as he does.
5. 作"虽然"、"尽管"解,引导让步状语从句。常用倒装语序,即adj. /adv. / n.+ 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)
二、 as作关系代词,引导定语从句,作"正如"、"这一点"解。如:
He is very careful, as his work shows.
As is well-known, Taiwan belongs to China.
另外,当先行词被the same, such等词修饰时,常用as来引导定语从句。如:
Such a clever boy as he can learn anything quickly.
I was reading the same book as he bought yesterday.
三、 as作介词的用法:
as引导的介词短语大多用作状语,as译为"作为";少数情况可引起宾语补足语。如:
As a League member, I'll take the lead in everything. (状语)
She works as a doctor. (状语)
They have me as one of their own children.(引起宾语补足语)
as的分类
副词
:ad.1. 跟...一样地,同样地 例如:I'm as tall as he 我和他一样高。
2. 如同;例如 例如:There are lots of famous buildings as the Eiffel Tower and the Arch of
Triumph. 这里有许多著名建筑如埃菲尔铁塔和凯旋门。
介词
prep.1. 作为,以...的身份 例如:He works as a tour guide. 他作为导游工作。
2. 当作 例如:She is a famous person as a actress. 作为一个女演员,她很出名
3. 像;如同 例如:The old woman was dressed as a young lady. 这位老妇人打扮得像一位年轻人。
连接词
conj.1. 像...一样;依照;像 例如:You ought to do as Paul tells you. 你应按照保罗吩咐的做。
2. 当...时 例如:As she was leaving the room she remembered that book. 她离开房间时想起了那本书。
3. 随着 例如:As the sun rose the fog dispersed. 太阳一出来,雾随之消失。
4. 因为 例如:We didn't know what to do as we were just visiting there. 我们不知道该
怎么办，因为当时我们仅仅在那里作访问。
5. 虽然 例如:Tired as he was, he stayed up late. 他虽然疲倦，可仍然很晚才睡。
6.尽管 例如：Try as she might,Sue couldn't get the door open.尽管想尽一切办法，苏还是不能打开那扇门
代词
pron.1. (与such,the same,as等连用,引导关系从句)与...相同的事物(或人) 例如:He has
earned as much money as I have. 他赚的钱和我赚的一样多。
2. (引导从句,对前述内容作补充)本情况,该事实 例如:She has married again, as was
expected. 她已再婚,这是意料中的事。
缩写词abbr.1. =Anglo-Saxon 盎格鲁-撒克逊人;盎格鲁-撒克逊语;盎格鲁-撒克逊人的;盎格鲁-撒克逊语的
2. =antisubmarine 反潜艇的
3. =Asia 亚洲;亚细亚
4. =Asian 亚洲的;亚洲人;亚洲人的
前缀:=ad 用于s前