as的用法总结

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as可用作连词,引导比较、时间、原因及方式等四种状语从句,应注意的是,引导的比较状语从句往往有省略;引导的时间状语从句一般用一般现在时而不用一般将来时;引导原因状语从句时与“Because"和“since”引导的从句比较起起来语气最弱。

as作介词,意思时“作为”,“以……身份"。例如:He came to China as a tourist five years ago。

而表示像…一样时,like通常作介词用,而介词后面通常接名词,代名词和动名词。

as in Australia“和在澳大利亚一样”.

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

1.as是连词,表示“随着”的意义。lives是life的复数,意义是“生活”。

2。as是连词,表示“因为,由于"的意义。wanting是现在分词,表示主动意义,wanting to buy

cars=who want to buy cars.

As的用法小结

as可以作连词、介词及关系代词和副词.现将其用法小结如下:

(一)、 as作连词的用法:

1。作“在—————-—期间,当———-的时候"引导时间状语从句.注意与when、 while的用法区别。

①下列情形时,只用as, 而不用when或while。

1)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 sings as she goes to school。

He looked behind occasionally as he went forward in the forest.

2)表示两个同步发生的动作或行?意思是随着—-—--的发展.如:

As time went on / by, she became more and more beautiful 。

As children get older, they become more and more interested in everything。

3)表示两个短暂行为或事情几乎同时发生。如:I watched her as she read the book.

I thought of it just as you opened your mouth.

Just as the flying worm hit her face, she gave a loud cry。

4)接在名词后面表示某一个年龄段时。如:

As a young man, he was active in sports。 ②when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 I was

at college, I could speak several foreign languages。 When the clock struck twelve, I

had slept for 2hours。

③ 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.

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 he’s been ill for ages, I will help him.

As / Since you’re not feeling well, you may stay at home。

As he wasn’t ready , 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:

Do as I told you.

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 as much as possible.

I don't speak English so/ as well as she does.

5。 表示虽然,尽管 等,引导让步状语从句,常用倒装语序,模式为:

adj. /adv. / n。+as +主语+谓语+主句。如: Young as he is, he knows much。

Tired as they were, they walked on.

6. 表示也——---—一样。 She is a doctor, as was her husband.

(二)、 as作关系代词,引导定语从句,表示正如,这一点.如:

He is very careful, as we all know。

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 girl as she can learn anything quickly.

I was reading the same book as he bought yesterday。

(三)、as作介词的用法。

1。表示好像.如:He dressed as a policeman.

2。 表示作为当作。如:I found a job as a guide。

3。 当某人是某身份时。如:As a child , she was sent to abroad。

4. 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 Party member, I’ll take the lead in everything。 (状语)

She works as a model. (状语)

She has me as one of her best friends.(引起宾语补足语)

(四)、作副词的用法 1 表示与——-—--等同。如:This dress is twice as expensive as that

one。 2 像,如等。如:As before, he remained unmoved。

总之,通过以上的分析,我们对as的词性和用法有了比较全面的理解和把握,才能在实际的运用中做到心中有数,应付裕如.

常见词as用法总结

近几年高考中有关as一词的题目出现过很多次,其中as或是最佳选项,或是干扰项,或是题干中的关键信息点,涉及as作为连词、介词、关系代词、副词以及习语等各种用法。现结合高考试题将as的用法归纳如下:

一、 用作连词的as

1。 引导时间状语从句,表示“当……的时候",其用法与when和while类似。例如:As a child (When he was a child), she was sent to six

different schools。 此用法中as多表示从句与主句动作同时进行,一般不与状态动词连用,意为“一边……一边……”.例如:She sang songs as she

did her homework.

as 还可以表示一动作紧接着另一动作发生,说明另一动作的结果,有“随着……”的含义.例如:As time went by, we found he was an honest

man。/As he grew older, he lost interest in everything except gardening。

例1 It wasn't until nearly a month later________ I received the

manager's reply.

A。 since B。 when

C。 as D. that

解析:本题中的as与when一起作为干扰项,容易使同学往时间状语从句上思考,事实上本题是强调句,正确选项是D。 2. 引导原因状语从句,表示“由于,因为",相当于because, 但通常置于句首.例如:As he is a qualified doctor, I trust his advice on medical

matters。

例2 _____ modeling business is by no means easy to get into, the

good model will always be in demand。

A. While B。 Since

C。 As D。 If

解析:本题中as干扰性很强,很多同学误以为是原因状语从句,但仔细分析不难发现正确答案应是A(while表示“只要")。

3。 引导让步状语从句,通常可与although或though通用,但语序不同,although或though用于句首,as用于倒装结构。例如:Young as I am,

I already know what career I want to follow. /Although(或Though)I am

young, I already know what career I want to follow。

as 表示让步用于倒装结构,通常将从句的表语、状语或动词前置.如果表语有冠词a/an, 需去掉.例如:Great scholar as he is, he is lacking in

common sense./Much as I like you, I couldn’t live with you。 / Try as he

would, he couldn't

open the door.

例3 _____ he has limited technical knowledge, the older worker has

a lot of experience。

A. Since B. Unless

C. As D. Although