2.定语从句与状语从句的互换

(1)由where引导的地点状语从句与where引导的定语从句的互换。

He found the books in the place where he had put．(定语从句)

=He found the books where he had put．(地点状语从句)

他在放书的地方找到了那本书。

=We are to go to places where we are most needed．(定语从句)

We are to go where we are most needed．(地点状语从句)

我们应该去最需要我们的地方。

(2)由so．．as和such．．as引导的定语从句与so．．that和such．．．that引导的结果状语从句的互换。

This is such an interesting book as I'd like to read．

=This is such an interesting book that I'd like to read it．

这本书很有趣，我想看看。

第一个句子为定语从句，关系代词as指代先行项为book的定语从句中read的宾语。第二个句子为结果状语从句，在结果状语从句中，it指代book，作read的宾语。

It is so important a match as we can't miss．

=It is so important a match that we can'tmiss it．

这是那么重要的一场比赛，我们决不能错过它。

(3)有时定语从句有状语从句的功能，反过来，有些状语从句可以用定语从句来表达。

When she praises a book，it will become a best-seller．(人教大纲版高一下第34页)

=A book she praises will become a best-seller．

她所推崇的书籍都成了畅销书。

When a dog is angry，it will stare at you，show its teeth and snarl．(人教大纲版高一下第122页)

=A dog that is angry will stare at you，show its teeth and snarl．

=An angry dog will stare at you，show its teeth and snarl．

狗要是生气的话，它会盯着你看，露出牙齿，狂吠不止。

提示：

上述两个例句中的when引导的从句表示假设。

A collection becomes valuable if it is complete，that is，if it includes all the items in a series，or if it contains rare items．(人教大纲版高三第150页)

=A collection that is complete becomes valuable，that is，one that includes all the items in a series，or that contains rare items．

一个收藏录如果收集得很齐全，也就是说，包含了一个系列的所有品目，或含有珍稀品目的话，那它就相当贵重了。

A nation cannot prosper long when it favors only the prosperous．(Obama' Inaugural Speech)

=A nation that it favors only the prosperous cannot prosper long．

一个仅有财富的国家不可能持续繁荣。

提示：

在A nation cannot prosper long when it favors only the prosperous中的when表示条件。