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as的重要性

发布时间:2013-01-15  编辑:查字典英语网小编

 

  由查字典英语网为您提供

  在高三课本第十五单元出现了下面几个句子:

  1 As Kofi Anna,Secretary General of the United States said,“each contribution -- how small -- can help make a difference.

  2 Now she is spending a year in remote part of southwest China working as a volunteer teacher in a village school.

  这几个句子都涉及到了as的用法。作介词用,第一句话中as用作关系代词,引导定语从句,含义为“正如,第二句话中as的含义为“作为,当作,做介词。

  下面让我们结合历年高考试题对其用法进行分析。

  一.用作连词引导让步状语从句

  从句必须用倒装语序,把作表语用的名词(不加冠词)或作表语的形容词,或动词(原形),或副词提到as前面。如:

  1.Child as he is,he knows a lot.

  2.Tired as they were,they stayed up late preparing for the coming exams.

  3.Try as he would,he failed again this time.

  考例:1.(2005重庆)___,he talks a lot about his favorite singers after class.

  A.A quiet student as he may be

  B.Quiet student as he may be

  C.Be a quiet student as he may be

  D.Quiet as he may be a student

  【解析】答案是B。作表语的是名词student,名词前不加冠词。

  2.(2005.广东)____,Carolina,couldn't get the door open.

  A.Try as she might B.As she might be C.She might as try D.Might she as try

  【解析】答案是A。as引导让步状语,将动词原形try提到as前面。

  二.用作关系代词,引导定语从句

  as用作关系代词,引导定语从句,含义为“正如。如:

  1.He is very careful,as his work shows.

  2.As is known is reported in the newspaper,talks between the two countries are making progress.

  考例:(2005浙江)___I explained on the phone,your re quest will be considered at the next morning.

  A.When B.After C.As D.Since

  【解析】答案是C。意思是“正如我在电话里解释的那样……。

  2.(2006)The Beatles,____many of you are old enough to remember,came from Liverpool.

  A.what B.that C.how D.as

  【解析】答案是D。引导非限制性定语从句。

  三.作为副词

  用于表示“和……一样,的意思,as…as中间要用形容词/副词的原级,如as long as:长达;as far as远达;as much as:多达;as tall as含义为“高达…。如:

  That day they walked as far as ten kilometers in two hours.

  考例:(2005安徽)John is the tallest boy in the class,_______according to himself.

  A.five foot eight as tall as B.as tall as five foot eight C.as five foot eight tall as D.as tall five foot eight as

  【解析】选B.as…as中间要用形容词/副词的原级。

  四.引导时间状语从句

  含义为“当…的时候,如:

  1.I watched her as she combed her hair.

  2.As he grew older ,he lost interest in everything except gardening.

  考例:1.(NMET1994)Mother was worried because little Alice was ill,especially____Father was away in France.

  A.as B.that C.during D.if

  【解析】答案是A.“在……时候,相当于when.而C选项是介词,不接句子。

  2.(MET90)_____the day went on,the weather got worse.

  A.With B.Since C.While D.As

  【解析】答案是D.“随着的意思,as the day went on可以作为固定结构记住。

  五.作介词用

  有“作为,当作的意思。如:

  1.They were all dressed as clowns.他们都打扮得如小丑。

  考例:(2005广东)I feel that one of my main duties_____a teacher is to help the students to become better learners.

  A.for B.by C.as D.with

  【解析】选C。“作为教师的意思。

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