语法检测-文法精说：不能小看" as"
编辑：pitaya02 日期：2020-11-05
下列句子出现于高三教科书第十五单元：
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.
这些句子都与 as的用法有关。作为介词使用， as在第一句中是一个关系代词，引导定语从句，意思是“是”；而在第二句中， as是一个介词，做介词，“是”。
以下我们结合历年高考试题来分析一下它的用法。火龙果智能语法检测
作为连词用来引导让步状语从句
一个小句子必须使用倒装顺序，把作表语使用的名词(不加冠词)或作表语的形容词、动词(原形)或副词提到 as之前。例如：
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。名词作表语，名词前不作冠词。火龙果智能语法检测
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，动词 try指向 as前的原形。
用作关系代词，引自定语从句
作为关系代词 as引导定语从句，意思是“正如”。例如：
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.
When B. After C. As D. Since
(解析)答案是 C。这意味着“就像我在电话上解释的那样…”火龙果智能语法检测
2.(2006)The Beatles，____many of you are old enough to remember，came from Liverpool.
A. whatB.th at C. howD.as
(解析)答案是 D。指导无限制的定语从句。
作为一种副词
用来表达在 as… as中使用形容词/副词的原始级别，如 as long as：长达； as far as：远达； as much as：多达； as tall as：高达…例如：
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]在B.as… as中选择形容词/副词的原始级别。火龙果智能语法检测
时间状语从句的引导
意思是"当…时"，例如：
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. asB.th at C. during D. if火龙果智能语法检测
(b)答案是 A.“在…时”，等于 when.而 C选项是没有连接句子的介词。
2.(MET90)_____the day went on，the weather got worse.
A. With B. Since C. While D. As
(一)答案是 D.“随着”，而 as the day went on可以作为固定结构被记忆。
5.介词用法
它的意思是“作为，作为”。例如：
一. They were all dressed as clowns.他们都穿得像个丑角。
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. fo rB.byC.as D. with
[分析]选择 C。「老师」的意思。
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