状语从句有哪几种

状语从句根据其作用可分为时间、地点、原因、条件、目的、结果、让步、方式和比较等从句。状语从句一般由连词引导，也可以由词组引起。从句位于句首或句中时通常用逗号与主句隔开，位于句尾时可以不用逗号隔开。

1.I will go there directly I have finished my breakfast.吃完早饭，我立即到那里去。

2.The moment I heard the news, I hastened to the spot.我一听到消息，马上赶到了出事地点。

3.As soon as I reach Canada, I will ring you up.我一到加拿大，就给你来电话。

4.He had no sooner arrived home than he was asked to start on another journey.他刚到家，就被邀请开始另一旅程。

5.No sooner had the sun shown itself above the horizon than he got out of bed to commence work.太阳刚从地平线上升起，他就起床劳动去了。