as的用法
编辑： admin 2018-29-08
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概括：这道题是扶伪形同学的课后英语练习题，主要是关于as的用法，指导老师为乐老师，下面是详细讲解。
题目：as的用法
解：一、as作连词的用法
1. as...as的用法
as...as意为"和……一样",表示同级的比较.使用时要注意第一个as为副词,第二个as为连词.其基本结构为：as+ adj./ adv.
+as.例如：
(1)This film is as interesting as that
one.这部电影和那部电影一样有趣.
(2)Your pen writes as smoothly as
mine.你的钢笔书写起来和我的一样流畅.
其否定式为not as/so +adj./ adv.
+as.例如：
This dictionary is not as/so useful as
you think.这本字典不如你想象的那样有用.
若有修饰成分,如twice, three times, half, a
quarter等,则须置于第一个as之前.例如：
Your bag is twice as expensive as
mine.你的袋子比我的贵一倍.
几个关于as...as的常见句型：
(1)as...as possible
Please answer my question as soon as
possible.请尽快回答我的问题.
(2)as...as usual/before
She looks as pretty as
before.她看起来和以前一样漂亮.
(3)as long as... (引导条件状语从句)
It took us as long as three years to
carry out the plan.我们花了长达三年的时间才完成这项计划.
(4)as far as
He walked as far as the railway station
yesterday evening.昨天傍晚,他一直散步到火车站.
(5)as well as
She cooks as well as her mother
does.她烧菜烧得跟她母亲一样好.
一些带有as...as结构的常见短语归纳：
as busy as a bee像蜜蜂一样忙碌
as easy as ABC像ABC一样容易
as deep as a well像井一样深
as light as a feather像羽毛一样轻
as soft as butter像黄油一样软
as rich as a Jew像犹太人一样富裕
2. as用作连词引导时间状语从句
as与when,while都是引导时间状语从句的从属连词,含义都是"当……的时候".但它们有区别：用when时,从句的动作可以与主句的动作同时发生,也可以先于主句的动作发生；用while时,从句的动作为一过程,主句动作与从句动作同时进行或在从句动作过程中发生；用as时,主句和从句的动作同时发生,具有延续的含义.例如：
(1)It was snowing when he arrived at the
construction site.他到达工地时,天正在下雪.
(2)He was watching TV while his mother
was cooking.他母亲做饭时他在看电视.
(3) You will grow wiser as you grow
older.你会随着年龄的增长而越来越聪明.
3. as用作连词引导原因状语从句
as,because,since都可以表示因果关系,连接原因状语从句,含义是"因为,由于",但它们有区别：because表示的语气最强；as一般放在句首,语气较弱,较口语化；since常常用在书面语中,表示多为对方已知的、或稍加分析便可得知的原因,有时可译作"既然".例如：
(1) He will succeed because he is in
earnest.他一定会成功,因为他很认真.
(2) Since you are so sure of it he”ll
believe you.既然你对此如此有把握,他会相信你的.
(3) As rain has fallen, the air is
cooler.因为下过雨,空气比较清爽.
4. as作连词引导让步状语从句
as与although (或though),however (或no matter how)等都可以引导让步状语从句,含义是"虽然,尽管",但它们有区别：although语气稍正式些,可放在句首,也可放在句中,主句中不能再用but,但可以用yet；as所表示的语气较强,引导的让步状语从句用倒装语序；however引导让步状语从句时,它的后面可跟形容词或副词,也要用倒装语序.例如：
(1) Although he is quite old, he still
jogs every day.他虽然年纪相当大,仍然每天慢跑.
(2) Strange as it may seem, nobody was
injured in the accident.这次意外虽然显得令人不可思议,却没有人受伤.
(3) However hard he may try, he will not
attain his goal.无论他怎样努力也达不到目标.
二、as作关系代词的用法
关系代词as引导定语从句时,既可以单独使用,也可以与其他词连用,其用法要比that和which更为复杂.
1. as引导定语从句与其他词连用
①用于the same...as结构中
This is the same book as I read last
week.这本书和我上周读的那本是一样的.
②用于such...as结构中
I don”t like such books as he
recommends.我不喜欢他推荐的那些书.
③用于"so +adj. + a/an + n. (单数) + as "结构中
I am not so strong a man as I
was.我已经没有从前那么强壮了.
2. as单独引导定语从句
as单独引导定语从句时,先行词可以是一个词,也可以是一个句子或短语.例如：
(1) She is late, as is often the
case.她迟到了,这是经常的事.(先行词是整个主句)
(2) To shut your eyes to facts, as many
of you do, is foolish.对事实视而不见--你们好多人都是如此的愚蠢.(先行词是不定式短语)
三、as作介词的用法
as作介词,意思是"作为","以……身份".例如：
He came to China as a tourist five years
ago.他五年前以游客的身份来过中国.
四、as作副词的用法
to the same degree or amount; equally
"相同地","同样地".例如：
They don”t have as many
airplanes.他们没有同样多的飞机.
举一反三
例1： as所有用法总结谁能帮忙把as的用法进行总结?[英语练习题]
思路提示：
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.
例2： 【总结as…as用法】
思路提示：
as+形容词原型+as 和……一样
as+形容词比较级+as 同上
as+倍数+形容词比较级+as 比……多（少）几倍
例3： notas.as的用法和典型句子[英语练习题]
思路提示：
not as.as 不如,不及
句型：A＋v.（包括be动词和行为动词）＋not as +形容词和副词的原级＋as+B（A和B指人）
I'm not as tall as you. 我比你矮；我没有你高
Jack doesn‘t run as fast as Tom.杰克比汤姆跑得慢；杰克没有汤姆跑得快
例4： as……as用法总结![英语练习题]
思路提示：
一、基本用法
as ...as
用于比较句型,中间插入的是形容词或副词的原级.意思是"达到与什么相同的程度".如：He is as strong as a horse.他力大如牛.
二、习惯用法
1.as soon as
意思是"一.就.",引导一个时间状语从句.如：I'll call you as soon as I finish my homework.我一完成我的作业,就给你打电话.
2.as long as
意思是"长达.之久；只要.".如：She has searched the information about dinosaurs on the Internet as long as three hours.她在因特网上搜索有关恐龙的信息已经长达三个小时.
3.as much as
意思是"高达.；与.一样多".是用来表达极其多的语气.如：Some of the stones weigh as much as fifteen tons.有些石头重达15吨.
★as...as用法：
as...as意为"和……一样",表示同级的比较.使用时要注意第一个as为副词,第二个as为连词.其基本结构为：as+ adj./ adv.+as.
例如：
(1)This film is as interesting as that one.这部电影和那部电影一样有趣.
其否定式为not as/so +adj./ adv.+as.例如：
This dictionary is not as/so useful as you think.这本字典不如你想象的那样有用.
若有修饰成分,如twice,three times,half,a quarter等,则须置于第一个as之前.
例如：
Your bag is twice as expensive as mine.你的袋子比我的贵一倍.
几个关于as...as的常见句型：
（1)as...as possible
Please answer my question as soon as possible.请尽快回答我的问题.
(2)as...as usual/before
She looks as pretty as before.她看起来和以前一样漂亮.
(3)as long as...(引导条件状语从句)
It took us as long as three years to carry out the plan.我们花了长达三年的时间才完成这项计划.
(4)as far as
He walked as far as the railway station yesterday evening.昨天傍晚,他一直散步到火车站.
(5)as well as
She cooks as well as her mother does.她烧菜烧得跟她母亲一样好.
★as...as的结构：
as + 形容词或副词原级 + as
1）在否定句或疑问句中可用so… as.
He cannot run so/as fast as you.
2）当as… as 中间有名词时采用以下格式.
as +形容词+ a +单数名词
as + many/much +名词
This is as good an example as the other is.
I can carry as much paper as you can..
3）用表示倍数的词或其他程度副词做修饰语时,放在as的前面.
This room is twice as big as that one.
Your room is the same size as mine.
4) 倍数+ as + adj.+ as 倍数+ then + of
This bridge is three times as long as that one.
This bridge is three times the length of that one.
Your room is twice as large as mine.
Your room is twice the size of mine.
例5： 【这个句子里as是什么用法whichofthefollowingisnotmentionedashavingtodowithgoodhealth】[英语练习题]
思路提示：
as 是介词
as having to do with good health 是介词短语做主补,对Which 加以补充说明.
相关思考练习题：
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题4：as的用法是什么
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