as的用法

    as这个词看似简单，但用法却是很多的，对它的正确理解关系到英语应用能力的提高，因此我们有必要对其用法和搭配进行详细阐述。

一、as作介词

    1. 区别as和like

      as作为介词时，可以表示“像……”，这时它可以和like互用；as还可以表示“以……身份”或“作为……”，“当作……”，但like不能。

      e.g. I) They lived and fought among the people as “fish in water”. (as相当于like)

         II) As a scientist, he was dedicated to (致力于) the truth. (这里不可以用like)

II) They talked as old friends. (他们确乎是老朋友。)

            à They talked like old friends. (他们像老朋友一样。)

    2. as引导的介词短语在句中可以充当：

      a) 宾语补足语

      e.g. I) She spoke of me as her dearest friend.

         II) The plan struck me as very much worthwhile.

         III) You mustn’t think of me as (being) unhappy.

      b) 主语补足语

      e.g. I) She is well-known as being very cheerful.

         II) He is sometimes portrayed as belonging to another century.

         III) That picture is looked upon as very valuable.

      常用于这类结构的动词有：accept, consider, describe, elect, interpret (理解), look upon, perceive, recognize, refer to, regard, see, strike, take, think of, treat, view等等。

二、as作连词

1. 作“当……的时候”,引导时间状语从句。注意与when、 while的用法区别。

A.  when作"当……的时候"解,可以指较短的(一点)时间,也可指一段时间。

e.g. I)When he was at college, he could speak several foreign languages.

II) When the clock struck twelve, all the lights in the street went out. 

B. 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。

e.g. Work while you work. Play while you play.

C. 但属下列情形时,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……”。

e.g.I)The girl dances as she sings on the stage. 

II) He looked behind from time to time as he went forward.

2)表示两个同步发展的动作或行为,译为“随着……”。

e.g. I) As time went on / by, she became more and more worried. 

II) As children get older, they become more and more interested in the things

around them. 

3)表示两个短促行为或事件几乎同时发生。

e.g. I) I thought of it just as you opened your mouth. 

II) Just as the flying worm hit her face, she gave a loud cry.

4) 后接名词表示某一年龄段时,用as。

e.g. 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。

e.g. I)As / Since you’re not feeling well, you may stay at home.

II) 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。

e.g. I)He speaks English as Americans do.

II) 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。

e.g. I) They helped the old man as often as possible. 

II) 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。

e.g. I) Tired as they were, they walked on.

II) Child as he is, he knows a lot. (child前不用冠词)

6．as引导类比从句，与so 连用，表示“正如……所以……”。

e.g. Just as French people enjoy their wine, so the British enjoy their beer.

     如同法国人喜欢他们自产的葡萄酒一样，英国人喜欢他们自产的啤酒。

三、as作副词

    1．表示同等程度、质量、数量等，作“一样地……”解释。

        e.g. I) Steve runs fast, but I run just as fast.

             史蒂夫跑的很快，但是我跑的和他一样快。

          II) Tom has a lot of money, but I don’t have as much.

             汤姆有很多的钱，而我的钱没有他多。

    2．用在形容词或者-ed形式的过去分词前，相当于形容词或过去分词作定语，但as仍然保留其原来的词汇意义。

        e.g. I) In the dead of night I was suddenly wakened by a cry as made by a wolf.

             在寂静的黑夜里，我突然听到了一声如同狼嚎一样的叫声。

           II) The old man began to describe the accident as seen through the eyes of a witness.

             这位老人开始描述这一起事故，如同是一个证人亲眼目睹了一般。

四、作as作关系代词，引导定语从句，不仅可以代替一个名词，而且可以代替整个句子或一件事，通常译作 “正如这一点”，“如……一样”。

    e.g. I) As is known to everybody, the moon travels around the earth once every month.

如同大家所知道的一样，月亮每月围绕地球旋转一次。

       II) As has been said before, grammar is not a set of dead rules.

         如同以前说过的一样，语法并不是一套死规则。

III) Such a clever girl as she can learn anything quickly.

         像她这样聪明的女孩子学任何东西都很快。

      IV) It was absolutely bad manners to get into people’s room without knocking, as quite a few young people are doing every day.

         不敲门就进入别人的房间绝对是不文明的行为，现在很多年轻人每天都这么干。

五、as构成的固定词组

1．as可以构成介词词组：

as against（与……相比）；as compared with（与……对比）；as for / to（至于，关于）；as from / of（自……起）；as a result of（由于……的结果）；as regards（至于）；

e.g. I) The output amounts to ten thousand dollars as against eight thousand last year.

     和去年八千美元的产量相比，今年的产量达到了一万美元。

   II) There is no doubt as to who will be elected.

     至于谁会当选，这是毫无疑问的事。

   III) As a result of your carelessness, the whole project should be put off at least one month.

     由于你的粗心，整个计划将要被推迟至少一个月。

2．as可以构成副词词组：

    as above（如上）；as a matter of fact（事实上）；as a whole（就整体来说）；as follows（如下）；as good as（和……几乎一样，实际等于）；as such（照其资格，其本身）；such / so … as to（这样的……以至于……）；as yet（尚，至今还）（用于否定句）；as well（也）；

    e.g. I) As a matter of fact, he didn’t have any interest in the project.

         事实上，他对这个项目一点兴趣都没有。

       II) I am not so foolish as to make such a promise.

         我还没有愚蠢到会许下这样的承诺的地步。

      III) We are as good as ruined.

         我们几乎要崩溃了。

3．as构成词组作关系代词：

    as … go（就……一般情况来说）；as it is / was（事实上，按现状）；as it were（好像是）；

    e.g. I) He is quite good, as boys go. 就一般男孩子而言，他已经很好了。

       II) I thought conditions would get better, but as it was, they were getting worse.

         我以为情况会好转，但事实上，却是越来越糟糕。

4．as可以构成连词词组：

    according as（根据，按照……而）；in as (so) far as（根据……程度）；

    e.g. I) You may go or stay, according as you decide.

         你可以自己决定是去还是留。

       II）In as (so) far as we have known about the matter, we can make a decision after the meeting.   就我们对这件事情的了解程度，我们可以在会后作出一个决定。

 

第二篇：专四语法：as的用法

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。

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 sings as she goes to school.

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

b. 表示两个同步发生的动作或行为,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.

c. 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.

d. 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.

2） 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 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。

附言：

关于昨天讨论未竟之题

No one would have time to read or listen to an account of everything ____ going on in the world.

A. it is      B. as is      C. there is      D. what is

可从三方面来看不能选Ｂ：一是从上面的as的用法看出；二是as常常需要和别的词（如the same）搭配使用；三是用排除法：

不能选A和D, 因为原句考的是一个定语从句，it 不作引导词，而what 不能引导定语从句；

 

第三篇：英国essay范文

要写出一篇漂亮的命题小essay可不是那么容易，内容技巧以及格式都不可小视，尽量做到全面和细节。如果哪一点出了错误，录取官很容易认为该学生大意不注重细节，学生的形象也许就会打折扣了。一些学生的小文章没有通过，有共同的地方，也有个别原因。

优越论文网老师在这里总结出了essay写作中几大典型错误。

1、对申请学校认知不多。有的学生在选择学校和专业的时候没有仔细考虑自身的情况，甚至有的抱着非名校不读的想法，但是也没有仔细去咨询了解对方学校的情况。因此对于大多学校都会提出的问题——why choose this school，学生不能说出学校的大致情况、特点和优势，回答时敷衍了事，只说出最表层的一些东西。回答不到位就暴露出自己的态度，很难看出申请人对学校的兴趣和向往程度。

2、回答问题时没有正确审题。一些在思想上很懒惰的学生总以为各个学校问的题目差不多就可以互相借用，没有认真审题就把申请学校A的套用在学校B上；还有的学生审题不到位，在内容上出现了很多与主题或者申请不相干的部分。

3、找不到思路，不会转换。有的学生想考察学生的思维灵活度，想知道学生的专业水平或是人际交往的态度等，提出的问题都是很简单的。例如芝加哥大学：请比较苹果和橘子，这个题目就不应该只写两种水果的区别什么的，可以将两种水果拟人化，各种水果代表哪两种人等等。总之，思维不要太死板，学会转换。

4、词句使用不恰当。大多英语水平有待提高的学生要么用词太过简单，要么总是喜欢用晦涩、深奥的来让录取官认为自己的具有多大的词汇量。前者会使文章显得没有一点深度，后者容易使文章看着不顺畅，读着拗口。所以，在写作时首先要有条理表明自己的看法，其次使文章读起来语句通顺，再使用一些有真正意义和内涵的语句。

5、文章呈现的语气让人难以接受。有的文章语气平平毫无生气；有的过于激烈，为了显示自己是对的，极力鼓吹自己的看法或价值观；有的一味夸对方学校是多么地有名气，甚至用哀怜的语气博得录取官的同情。这都是不可取的，适当地赞扬即可，尽量使文章读起来有生机活力，做到态度理性冷静客观。

6、语法拼写等小错误。有的学生单词拼错，语法用错，用翻译机器硬生生地翻译，出现频率过高。学生不仅需要提高英文水平，最好是学会英语思维。

以上几点就是优越论文网总结的essay写作中容易犯的典型错误，在此陈列希望广大申请留学的学生借鉴，交上出彩的入学第一份作业。