as的用法(as 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hen、 hile的用法区别。
① hen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 as at college, he could speak several foreign languages.
When the clock struck telve, all the lights in the street ent out.
② hile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发生。如:
Work hile you ork. Play hile you play. 工作的时候工作。玩的时候玩。
③ 但属下列情形时,只用as, 而不用hen或hile。
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 ent forard.
B)表示两个同步发展的动作或行为,译为"随着……"。如:
As time ent on / by, she became more and more orried.
As children get older, they bee more and more interested in the things around them.
C)表示两个短促行为或事件几乎发生。如:
I thought of it just as you opened your mouth.
Just as the flying orm 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 as 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 ell, you may stay at home.
As he asn't ready in time, e ent ithout him.
3. as=in the ay 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 ell 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 ere, they alked on.
Child as he is, he knos 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 ork shos.
As is ell-knon, Taian belongs to China.
,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 as 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 orks as a doctor. (状语)
They have me as one of their on children.(引起宾语补足语)
短语
as ell 也;同样地;还不如
as ell as 也;和…一样;不但…而且
as one 一致的
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