英语六级题详解谢谢
as单独引导定语从句as单独引导定语从句时,先行词可以是一个词,也可以是一个句子或短语。例如:
(1) She is late, as is often the case. 她迟到了,这是经常的事。(先行词是整个主句)
(2) To shut your eyes to facts, as many of you do, is foolish. 对事实视而不见——你们好多人都是如此的愚蠢。(先行词是不定式短语)
注意1:
(1)当as引导的定语从句位于具有否定意义的主句之前时,as从句所修饰的范围是整个主句的内容,也就是说,把否定意义也包括在内。例如:As has been said above, grammar is not a set of dead rules. 正如前面所说,语法不是一套死条文。
(2)当as引导的定语从句位于具有否定意义的主句之后时,as从句所修饰的范围不包括否定意义。例如:Spiders are not insects, as many people think. = Spiders are not insects. But many people think they are. 许多人认为蜘蛛是昆虫,但蜘蛛并不是昆虫。
(3)当as引导的定语从句位于具有否定意义的主句中间时,as从句所修饰的范围也不包括否定意义。例如:She did not, as her friend had feared, open the case. 她没有打开盒子,而她的朋友就是怕她当面打开盒子。
注意2:当修饰句子的非限制性定语从句位于句尾时,as可以用which来替代。例如:I live a long way from work, as (which) you know. 我住得离工作单位很远,这你是知道
的。
但是,当as从句位于句首或句中是,as就不能用which来替代了。例如:As you will find out, I will never let you down. 你将会发现,我绝不会使你失望的。
有时可以和It's....that -clause进行转换