1. 时间状语从句（adverbial clauses of time）,多由连词引起。（when,after,before,as,as soon as,as long as,since,whenever,once）E.g. When we lived in town we often went to the theater.It was a long time before I got to sleep again.As the sun rose the fog dispersed(vt. 消散).少数不由连词引起状语从句。（now that,every time,each time,the moment,immediately,instantly,directly）E.g. Directly he uttered(vt. 说出)these words, there eas a dead silence.I had no sooner checked in the hotel than he arrived.2. 地点状语从句（adverbia
