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同时发生。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同时发生。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.

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 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