湖南省涟源市私立行知中学 曾省初
【高考走向】
As 的用法在高考中是要求重点掌握的内容,也是重现率较高的语言点，尤其是as用作关系代词用来引导非限制性定语从句。综观近几年的高考英语试题，其考查方式多通过“单项填空”进行，偶尔也出现在“短文改错”和“完形填空”中。本文以历届高考试题为例，对它的用法作一简要归纳。
1． As． 做关系代词,引导非限制性定语从句
as引导非限制性定语从句时，指代逗号前的整个句子（即先行词），可置于句首或句末。
Mary was late for school, as often happened.
As is known to all, the earth is round.
[高考考例]1． ______ is known to all, China will be an ______and powerful country in 20 or 30 years’ time （94SHMET.29）_.
A. That…advancing B. This … advanced C. As…advanced D. It… advancing
. [简析]答案为C逗号表明为非限制性定语从句.
[高考考例]2. ＿＿＿＿ is known to everybody, the moon travels round the earth once every month．
A．It B．As C．That D．What (NMET 2001)
[简析]牰汉疟砻魑非限制性定语从句。选B。
[高考考例]3.＿＿＿＿ is mentioned above, the number of the students in senior high schools is increasing．
A．Which B．As C．That D．It (上海’99)牑
[简析]牬鸢肝狟。与考例2同理。
[高考考例]4。____ has been announced , we shall have our final exams next month.
A. That B. As C. It D. What (上海’2003春。32)
焄简析]答案为B.
2． As 做关系代词, 引导限制性定语从句
as 做关系代词引导限制性定语从句时，关系代词常出现在the same…as, such…as, so…as, as…as 等结构中 如： This is not such a book as I expected.
[高考考例]5.(92SHmet )I am at least _____ age____ Robert if I am not older than he.
A. the same… as B. the same … with C. as same… as D. as same … with (上海’92)
[简析]答案为烝.
[高考考例]6.Our neighbour has ____ours.(03’Beijing.32)
A. as a big house as B. as big a house as C.the same big house as D. a house the same big as
[简析]答案为B.
[高考考例]7.It is generally believed that teaching is _____ it is a science.
A. an art much as B. as much an art as
C. much an art as D. as an art much as (2001NMET.28)
[简析]答案为B
3． As引导让步状语从句，表示“尽管”。
as引导让步状语从句，从句中的表语、状语或主要动词应移到句首
[高考考例]8． ____，I have never seen anyone who's as capable as John．（2001上海）
A．As long as I have traveled B．Now that I have traveled so much
C．Much as I have traveled D．As I have traveled so much
[简析]：答案为C。as引导让步状语从句，从句中的表语、状语或主要动词应移到句首。若表语是名词，该名词无冠词修饰。如： Child as he is，he knows much English．
4． As 引导比较状语从句
As 引导比较状语从句时(as…as /not as…as /not so …as )的中间常用形容词或副词的原级。
表示比较的几种不同句型：
当A=B时，用as … as 与…… 一样（表示同等程度）；当A∠B时，用not as/so … as 不如……（表示不到某种程度）
[高考考例]9.She doesn't speak ____her friend, but her written work is excellent.(MET93)
A. as well as B.so often as C.so much as D.as good as
[简析]答案为 A
[高考考例]10. After supper she would sit down by the fire ,sometimes for _____an hour, thinking of her young and happy days.(上海’2003春。35)牑
A. as long as B.as soon as C. as much as D. as many as
[简析]：答案为A.
[高考考例]11.. Americans eat ____ vegetables per person today as they did in 1910.
A .more than twice B. as twice as many
C .twice as many as D. more than twice as many (上海’2002春。39)
[简析]：答案为D.
[高考考例]12.With the help of the German experts, the factory produced _____ cars in 1993 as the year before. （94SHMET.23）
A. as twice many B. as many as twice C. as twice as many D. twice as many
[简析]：答案为D
5．As引导条件状语从句
引导条件状语从句的连接词主要有 as/so long as意思是“ 只要”(on condition that).
[高考考例]13.._____ I know the money is safe , I shall not worry about it.(2003Beijing.31 )
A. Even though B. Unless C. As long as D. While
[简析]：答案为C.
6．As引导时间状语从句
[高考考例]14.____the day went on, the weather got worse.(MET90)
A.With B.Since C.While D.As
[简析]：答案为D.
[高考考例]15.Mother was worried because little Alice was ill, especially ___ Father was away in France.(NMET94)
A. as B.that C.during D.if
[简析]：答案为 A.这个句子的意思是“妈妈很担心，因为小艾丽斯病了，特别是在爸爸在法国出差期间。”especially后面接的是一个时间状语从句。因此要填 as。当然也可填when，while。during是介词，后接名词或代词，不能接句子。
注意：时间状态语从句中用一般现在时表示将来时间，用现在完成时表示将来完成时间。例如：
As soon as my brother arrives, we'll start working.
[高考考例]16.The new secretary is supposed to report to the manager as soon as she ____.(MET90)
A. will arrive B.arrives
C.is arriving D.is going to arrive
[简析]：答案为 B.
7. As引导方式状语从句
[高考考例]17. Careful surveys have indicated that as many as 50 percent of patients do not take drugs _____ directed.
A) like B) so C) which D) as
[简析]：答案是D。全句的意思是：“周密的调查已经表明：多达百分之五十的病人没有按照医嘱服药”。as引导的方式状语从句中，常常会省略一部分。句中"…take drugs as directed"相当于"…take drugs as they are directed"
8. As引导原因状语从句：
引导原因状语从句的连接词通常有because（因为），as（由于），Since（由于），now that（既然；由于）等。例如：
As it is raining, you had better take your umbrella with you.
[高考考例]18. We had better hurry it is getting dark.
(A)and (B)but
(C)as (D)unless ( 1984年 高考 .19.)
[简析]：答案为 B.
9.as if, as though
"仿佛……似的"，"好像……似的”，引出的状语从句谓语多用虚拟语气.
例如：
They completely ignore these facts as if (as though) they never existed.
他们完全忽略了这些事实，就仿佛它不存在似的。（与事实相反，谓语用虚拟语气。）
He looks as if (as though) he had been hit by lighting.
他那样子就像被雷击了似的。（与事实相反，谓语用虚拟语气。）
[高考考例] 19.The foreign friend speaks Chinese so well as if he _________a Chinese.
A.is B.be C.should be D.was
[简析]：答案为 D
[高考考例] 20. The tree looked as if it ______ for a long time.
A. hasn't watered B. didn't water
C. hadn't bee watered D. wasn't watered
[简析]：答案为 C.那棵树看上去好象很久没人给浇水了。
10.．作介词，意思时“作为”，“以……身份”。
例如：He came to China as a tourist five years ago
.
作者：曾省初
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