关于as的用法

as九大用法~

as只有作副词、介词、连词、代词等四大用法，具体用法如下：
一）as作副词，表示程度，意为“同样地”。在“as．．．as．．．”，“not as．．．as．．．”结构中的第一个as是副词，作“和／与．．．(不)一样”解。eg：Jack is as tall as his father．杰克和他的父亲一样高。He doesn't speak English as／so fluently as you．他的英语说得不如你流利。二）as作介词。1．作“如，像”解。eg：They got united as one man．他们团结得像一个人一样。2．作“充当，作为”解。eg：As a writer，he was famous．作为作家，他是很有名的。三）as作连词，常用来连接主句和状语从句。1．引导时间状语从句，作“当．．．的时候”解，有“随着．．．”之意，与while意义相近，强调两个动作同时发生；或某事一发生，另一事立即发生。eg：He shouted aloud as her ran along．他一边往前跑，一边高声地呼喊。I was startled as he opened the door．他一开门，我吓了一跳。as作连词，相当于when。eg；As a little boy (When he was a little boy)he began to learn to play piano．他小时候就开始学弹钢琴。2．引导原因状语从句，作“因为，由于”解，与because的用法相近。eg；I must stop writing now，as I have rather a lot of work to do．我必须停笔了，因为我还有许多工作要做。3．引导方式状语从句或比较状语从句，作“正如，(如)像”解。例eg：As in your country，we grow wheat in the north and rice in the south．正如(像)你们国家一样，我们在北方种小麦，在南方种大米。(方式状语从句)When at Rome，do as Romans do．入乡随俗。(方式状语从句)4．引导让步状语从句，作“虽然，尽管”解。这时从句常用倒装语序，即把从句中的表语、状语或动词原形放在as之前。eg；Strange as it may seem，it is true．尽管这事看上去很奇怪，但却是真的。Try as he might，Tom could not get out of the difficulties．不管怎样努力，汤姆还是摆脱不了困境。四）as作关系代词。1．引导限制性定语从句，用在“such．．．as”,“the same．．．as”，“as．．．as”等结构中，常译作“像．．．一样的人(或物)”，“凡是．．．的人(或物)”。例eg：He wished to be such a man as Lei Feng was．他曾希望做一个像雷锋那样的人。My hometown is no longer the same as it was．我的家乡再也不像过去一样了。2．引导非限制性定语从句，用来指代它前面的整个句子(即先行句)，意思是“这一点”。这个分句可以位于句首、句中或句末。eg：As is well known，oceans cover more than 70％ of the earth．我们知道，海洋占地球面积的百分之七十以上。

扩展资料：
缩写为AS的单词
1. =Anglo-Saxon 盎格鲁-撒克逊人;盎格鲁-撒克逊语;盎格鲁-撒克逊人的;盎格鲁-撒克逊
语的
2. =antisubmarine 反潜艇的
3. =Asia 亚洲;亚细亚
4. =Asian 亚洲的;亚洲人;亚洲人的
参考资料来源：百度百科：AS

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 ****er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*。
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 h*e as many airplanes.他们没有同样多的飞机。 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.
When the clock struck twelve, all the lights in the street went out.
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*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 g*e 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 *.
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 well 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 were, they walked on.
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2001年的高考题:
____________ is known to everybody, the moon tr*els 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 h*e me as one of their own children.(引起宾语补足语)

在中学英语课本中， as 多次出现。它的含义较多，且用法灵活。现将其用法分析归纳如下： 　　1. as 作为副词，常与连词 as 连用，意为“和……一样”。例如： as easy as ABC （非常容易）， as cool as cucumber （沉着的）， as stubborn as a mule （非常顽强的，倔强的）， as clear as crystal （非常透明的）， as poor as a church mouse （非常贫困的）， as busy as a bee （非常繁忙的）。在这些短语中，第一个 as 是副词，第二个 as 是连。在否定句中，作副词用的 as 可以用 so 代替。例如：　　It's not so easy as I thought. （这不像我想的那么容易。）　　2. as 作为连词，其意义和用法主要有：　　（ 1 ）意为“当……之时”，引导时间状语从句，在意思上相当于 when 和 while 引导的时间状语从句。例如：　　As he grew up， he became silent. （他长大以后，变得沉默寡言。）　　（ 2 ） 意为“既然，因为”，引导原因状语从句，不过它引导的原因状语从句时所表示的原因不如 because 引导的从句所表示的原因那么直接和强烈。试比较：　　As he wasn't ready， we went without him. （既然他没有准备好，我们就自己去了。）　　Because he was ill， he couldn't go to school. （因为他病了，所以不能去上学。）（原因状语从句表示“不能去上学”的直接原因）　　（ 3 ） 意为“虽然，尽管”，引导让步状语从句，在意思上相当于 although 引导的从句。 as 引导让步状语从句时，常以下列句式出现：名词 / 副词 / 动词 （原形） / 形容词 +as+ 主语 + 其他成分。例如：　　Child as he is （ =Although he is a child ） ， he can speak English. （尽管他是个孩子，他却能讲英语。）　　Young as you are （ =Although you are young ） ， you can do it very well. （虽然你年轻，但你却能做得很好。）　　Much as I like it ， I'll not buy it. （虽然我很喜欢它，我也不会买。）　　Try as he may， he has little hope to win. （尽管他会尽力，但取胜的希望却很小。）　　（ 4 ） 意为“如，像”，引导方式状语从句。例如：　　You must do as I tell you . （你必须按照我告诉你的那样去做。）　　（ 5 ） 意为“作为……（某种身份），当做，视为”。例如：　　As a student， you must obey the rules. （作为学生，你必须遵守纪律。 ）　　3. as 作介词，意为“如同，作为”。例如：　　Unite as one man. （团结得像一个人。）　　as 还可以用于 regard ， view ， treat ， acknowledge 及类似意义的动词之后，构成固定搭配。例如：　　Most of us regard him as a kind man. （我们大多数人认为他是个好心人。）　　We treat them as our friends. （我们把他们当作朋友。）　　4. as 用作关系代词，引导非限制性定语从句，并在从句中充当主语、宾语或表语等，有“正如……”或“据……”的意思；它所引导的从句位置较灵活，可以位于句首、句中或句末。例如：　　As we know from his accent， he is from Shanghai. （正如我们从他的口音中所知道的，他来自上海。）（从句位于句首）　　Mary， as we had expected， passed the exam. （正如我们所预料到的，玛丽通过了考试。）（从句位于句中）　　as 还可以引导限制性定语从句。若先行词被 the same ， such 修饰，关系代词应用 as .例如：　　This is such an interesting book as everybody likes to read. （这是一本有趣的、每个人都喜欢看的书。）（ as 在从句中作宾语）　　This is such a good book as will help you in your study. （这是一本对你学习有帮助的好书。）（ as 在从句中作主语）　　He is not such a kind boy as he looks. （他看上去地个善良的男孩，实际上却不是。）（ as 在从句中作表语）　　You must show my wife the same respect as you show me. （你必须尊重我的妻子，就像尊重我一样。）（ as 在从句中作宾语）　　需要注意 as 引导定语从句时与 so/such……that 引导的结果状语从句的区别。试比较：　　This is such an interesting book as everybody likes to read. （ as 引导定语从句，代替先行词 book ，在从句中作宾语）　　This is such an interesting book the everybody likes to read it . （ that 引导结果状语从句，因为从句中 read 后面有代词 it 作宾语。）

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