精选优质文档-倾情为你奉上语法专题复习（四）状语从句讲解状语从句指句子用作状语时，起副词作用的句子。它可以修饰谓语、非谓语动词、定语、状语或整个句子。 一般可分为九大类，分别表示时间、地点、原因、目的、结果、条件、让步、比较和方式。尽管种类较多，但由于状语从句与汉语结构和用法相似，所以理解和掌握它并不难。状语从句的关键是要掌握引导不同状语从句的常用连接词和特殊的连接词即考点。现分别列举如下: 1I fell asleep when he was doing his exercises .他正作练习时我睡着了。（时间状语从句）3She always sings as she walks .她总是一边走一边唱。（时间状语从句）4I waited until he had finished his work .我等到他做完活。（时间状语从句）5It was not long before he told me about this affair .不久，他就告诉我这件事。（时间状语从句）6He has wor
