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]逗号表明为非限制性定语从句。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)
[简析]答案为B。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)
[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A.
[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)
