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"。〈BR>
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.
③while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。