状语从句状语从句是副词性从句，它在句子中担任状语，修饰主句的动词、形容词、副词或句子 。根据修饰的方面，状语从句可以分为以下九种。1、时间状语从句2、地点状语从句3、原因状语从句4、目的状语从句5、结果状语从句6、条件状语从句7、方式状语从句8、让步状语从句9、比较状语从句种类从属连词例句说明时间状语从句when whenever When I came into the room, he was writing a letter. 当我进屋时，他正在写信。We shall go there whenever we are free. 我们什么时间有空，我们就去那里。when 指的是“某一具体的时间”。whenever 指的是“在任何一个不具体的时间” 。比较并列连词when I was walking along the street when suddenly someone patted me on the shoulder from behind. 我正在街上走着，这时忽然有人从后面拍我的肩膀。when 意为“这时”或“在那个时候” ,可以看作是并列句,这种用法的when 分句一般位于句末。while While it was raining, they went out. 天下雨的时候，他们出去了。I stayed while he was away. 他不在的时候我在。All of us are working hard while he is sleeping.(然而：并列连词) while 指“在某一段时间里” ，“在⋯期间” ，while 引导的动作必须是持续性的。as He hurried home, looking behind as he went. 他赶快回家，一边走一边向后看。As time goes by, I like China better. 随着时间的流逝， 我越来越喜欢中国。as（一边 ...一边）引导持续性动作，强调主句和从句的动作同时发生；随着。before Be a pupil before you become a teacher. 先做学生，再做先生。I finished my task before I went home. 我做完作业才回家。before 译为 “在⋯之前 , 才 , 就”after He arrived after the game started. 比赛开始后，他到了。till until We waited till (until)he came back . 我们一直等到他回来。She didn ’ t stop working until eleven o’ clock .她到 11 点钟才停止工作。Until he had passed out of sight, she stood there. 她站在那里看着，直到看不见他的身影。如主句动词是 持续性动作 ，常用肯定式，表示“直到⋯为止”；如主句动词是 瞬间动词 ，要用否定式，表示“直⋯才”“在⋯以前不”,从句放在句首表示强...
