as...as...结构用法讲解
一、as…as 结构的基本用法
其基本意思为“与……一样”,其中的第一个as副词,其后通常接形容词或副词(用原级),第二个as可用作介词(后接名词或代词)或连词(后接从句)。使用时应注意以下几点:
1. 在否定句中,第一个 as 也可换成 so:
He doesn’t study as [so] hard as his brother. 他学习不如他弟弟努力。
2. 在该结构的两个as之间通常接形容词或副词的原级,但若涉及数量或程度,可用“as much+不可数名词+as”和“as many+可数名词复数+as”:
You’ve made as many mistakes as I have. 你犯的错误和我犯的一样多。
I haven’t got as much money as I thought. 我不像原来想像的有那么多钱。(R2/92)
其间接形容词时,有时该形容词还可修饰另一名词,但这个名词应带有不定冠词(注意词序):
She is as good a cook as her mother. 她和她妈妈一样是位好厨师。
也可说:She is a cook as good as her mother.
但不说:She is as a good cook as her mother. 或They are as good cooks as us.
二、关于第二个as的词性
第二个as后接从句时,该as通常为连词,但有时这个as还充当其后从句的主语或宾语,此时该as实为关系代词。如:
I gave him as much as he could eat. 他能吃多少,我就给了他多少。
We’ve got food for as many people as want it. 我们的食物,无论多少人吃都够了。
注:若第二个as用作连词引导一个表示将来意义的从句,则该从句可用现在时表示将来,也可直接使用将来时态。如:
We’ll get there as soon as you do [will]. 你一到,我们就到。
三、as…as…结构的修饰语
该结构根据情况可用使用以下修饰语:(not) nearly, almost, just, nothing like, exactly, not quite, half, one-ten, twice, three times, 30 per cent等,并且这些修饰语必须置于第一个as之前,而不能置于其后。如:
He doesn’t play half as well as his sister. 他演奏的水平不及他姐姐的一半。
This dress is twice as expensive as that. 这件连衣裙比那件贵一倍。
四、as…as…结构的省略
在非正式场合(尤其是美国英语中),有时可以省略第一个as。如:
When over forty, he married a woman poor as himself. 他在40多岁时娶了一个像他本人一样穷的女人。
另外,若意思明确,有时可省略第二个as及其后的相关词语。如:
The pianos in that shop will be cheaper, but not as good. 那家商店的收音机会便宜些,但质量没那么好。
第二篇:as...as的用法
as…as…结构学习要点
要点, 结构, 学习要点, 结构, 学习
第三篇:as的用法小结(精华版)
as的用法小结
as可以作连词、介词及关系代词。现将其用法小结如下:
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. (表示一段时间)
When the clock struck twelve, all the lights in the street went out. (表示时刻)
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
,后一个as是连词(连词后面可以跟动词、形容词、句子),引导比较状语从句。如:
5. 作"虽然"、"尽管"解即adj. /adv. / n.+ as +主语+谓语+主句。如: 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.
as的这种用法,请看20xx年的高考题:
is known to everybody, the moon travels round the earth once every month.
A. It B. As C. That D. What
字母下划横线的为正确答案)
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)