Adverbial clauses定义：在复合句中由从句表示的状语称作状语从句，它可以用来修饰谓语（包括非谓语动词）、定语或状语，或是整个句子。 准确掌握每一个连词的含义是掌握状语从句的关键。同时要注意主从句的时态呼应。状语从句一般分为九大类状语从句类别 : 时间状语从句 地点状语从句 原因状语从句 目的状语从句 结果状语从句 条件状语从句 方式状语从句 比较状语从句 让步状语从句1. 时间状语从句： 引导时间状语从句的连词有：when, while, as, the moment, before, after, till, until, since, as soon as 等。请注意 when, while, as 的区别When --- 当……时候 , 通常指某一特定的时间点，主句与从句的动作同时发生。When I opened the window, I saw him come up.When I have time , I will go to see you.When I came home, I met an old schoolmate of mine. He said he would tell her about it when he saw her.* 注意：在时间状语从句中，主从句都是将来的动作或状态时，习惯上主句用将来时，从句用一般现在时。When --- 正在……的时候，突然…。通常主句是进行时或 be about to 时，在翻译的时候，when 可以译成没想到或突然。I was walking along the street , when I met him.I was about to fall asleep when my sister came in.One evening, little Hans was sitting near the fire when he heard a loud knock at the door.When 当从句是进行时，主句是一般时，往往表示不满。Someone knocked at the door when I was having breakfast.When I was leaving the house, the postman arrived.When the children had gone to bed, she began toprepare her lessons. When=afterWhile --- 在……期间，往往指一段时间。While we were in America, we saw him twice.While we were talking, he came in.Strike while the iron is hot. While --- 表示一种不满情绪，意思是这边在干某种重要的事，而另一边在享受等。We are cleaning the classroom while they are playing the football.The soldier faces the powder while the beauty powder the face.While I am washing the floor, you can be cleaning the w...
