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关于as引导定语从句，请大家首先记住：as引导 限制性定语从句 和 非限制性定语从句 有着根本的不同。as引导的限制性定语从句只是用在一些固定结构如such，the same，as修饰的先行词后面。而as引导非限制性定语从句则没有这种结构上的要求。在考研英语真题中，主要涉及as引导的非限制性定语从句。
as引导的非限制性定语从句在句中的位置很灵活，可以位于句首、句中或句末，例如：
45 As is so often pointed out , knowledge is a two-edged weapon which can be used equally for good or evil.
妙语点睛 as引导的定语从句用在句首，此时，as指代后边的完整主句。
精品译文 正如人们常常指出的，知识是一把双刃剑，可以用于造福，也同样可以用来为害。
46 As is true of any developed society , in America a complex set of cultural signals, assumptions, and conventions underlies all social interrelationships.（1997年阅读第二篇）
妙语点睛 as引导的定语从句用在句首，此时，as指代后边的完整主句。
精品译文 与任何发达社会一样，在美国，一套复杂的文化信号、信念及习俗制约着所有的社会交往。
47 There is, as Robert Rubin, the treasury secretary , says , a “disjunction”between the mass of business anecdote that points to a leap in productivity and the picture reflected by the statistics.（1998年阅读第二篇）
妙语点睛 as定语从句用在句中，隔开了there is与a “disjunction”。
精品译文 正如财政部长Robert Rubin所说，显示生产力增长的大量商界轶闻与统计数字所反映的情况之间存在“脱节”。
48 There is, as has been suggested , a growing body of research literature in journalism and broadcasting, but very little significant attention has been devoted to the study of the interview itself.
妙语点睛 as引导的定语从句用在句中，隔开了there is与a growing body。
精品译文 正如前面已经提及的，对新闻与广播进行研究的文献越来越多，但是关注新闻采访本身的研究却很少。
49 I have discovered, as perhaps Kelsey will after her much-publicized resignation from the editorship of She after a build up of stress, that abandoning the doctrine of “juggling your life”, and making the alternative move into “downshifting”brings with it far greater rewards than financial success and social status.（2001年阅读第五篇）
妙语点睛 as引导的定语从句用在句中，隔开了discovered与其that宾语从句。
精品译文 我已经发现—— 也许 Kelsey 也会发现 ，她由于过于劳累而公开地辞去了在《她》的编辑职位——放弃“忙忙碌碌”的理论，而采取另一种“放慢生活节奏”的方式，会比经济上的成功和社会上的地位更有价值。
50 Stratford-on-Avon, as we all know , has only one industry—William Shakespeare—but there are two distinctly separate and increasingly hostile branches.（2006年阅读第二篇）
妙语点睛 as引导的定语从句用在句中，隔开了主语Stratford-on-Avon与其谓语has。
精品译文 众所周知，Stratford-on-Avon只有一个产业，即威廉•莎士比亚，但是存在着两个明显不同且日益敌对的分支。
51 This description even fits the majority eminent scholars. Being learned in some branch of human knowledge is one thing; living in “public and industrious thoughts”, as Emersion would say , is something else.（2006年英译汉）
妙语点睛 as引导的定语从句用在句中，隔开了主语public and industrious thoughts与其谓语is。
精品译文 这种描述甚至适合大多数著名学者。在人类知识领域的某个分支方面学识渊博是一回事；如同爱默生所指出的：生活在“可感知的和卓越的思想中”是另外一回事。
52 The world's three top central bankers （Greenspan, Duisenberg and Hayami） are all close to the top of the alphabet, even if one of them really uses Japanese characters. As are the world's five richest men （Gates, Buffett, Allen, Ellison and Albrecht）.（2004年阅读第二篇）
妙语点睛 as引导的定语从句用在句末。
精品译文 世界三大中央银行家（Greenspan, Duisenberg 和Hayami）的姓氏首字母都位于字母表前列（尽管他们其中一人实际上用的是日文），而世界上五大首富（Gates, Buffett, Allen, Ellison和Albrecht）也是这样。
53 18 Edward Zlotkowski, director of community service at Bentley College in Massachusetts, puts it, “There has to be coordination of programs. What's needed is a package deal.”
A. So B. Since C. As D. Thus
正确答案 C
妙语点睛 本题考查as引导的定语从句。
精品译文 正如马萨诸塞州Bentley学院社区服务主任Edward Zlotkowski所指出的：“必须要有项目之间的协调，需要的是一揽子计划。”
54 ______ is generally accepted, economical growth is determined by the smooth development of production.
A. What B. That C. It D. As
正确答案 D
妙语点睛 本题考查as引导的定语从句。
精品译文 正如人们普遍认为的，经济的增长取决于生产的顺利发展。
55 ____ can be seen from the comparison of these figures, the principle involves the active participation of the patient in the modification of his condition.
A. As B. What C. That D. It
正确答案 A
妙语点睛 本题考查as引导的定语从句。
精品译文 对比这些数据，我们就可以看出，基本原则是要求病人积极参与到改善自己健康状况的活动中。
as引导的非限制性定语从句，在考研作文中会大派用场。
56 As is seen from the chart , the average hours a student spends on the computer per week have increased dramatically in the past decade.
57 As is vividly betrayed in the cartoon above , a hen is promising what it should conduct to the public.（1998年作文）
58 As is obviously betrayed by the pictures above , three facts which are associated with smoking can be clearly realized by the public all over the world.（1997年作文）
59 As can be seen from the table/graph/figure , there is a marked increase/decline/favorable change in ...
60 As we can see from the table/graph/figure , drastic/considerable/great changes have taken place in...over the period of time from...year to...year.
上文提到，as引导限制性定语从句，只能用在一些固定结构中，如such, the same, as修饰的先行词后面。请看例句：
61 He'll repeat such points as are discussed in the book.
62 Such a student as works hard will be sure to succeed.
63 He tried to make as few mistakes as he could avoid.
64 He is not the same playboy as we knew.
65 The instrument is not such an instrument as I saw on the exhibition.
66 He is not such a man as would leave his work half done.
67 He is not such a fool as we would assume him to be.
68 It is unlikely that you will have such an exciting experience as Janet had a few years ago.
69 They made the same mistake as others would have made on such an occasion.
70 The new map of the ocean floor shows the locations of twice as many undersea volcanoes as were previously thought to exist.