Hearingtheirteacher'svoice,thepupilsstoppedtalkingatonce.(时间状语=Whentheyheardtheirteacher'svoice,thepupilsstoppedtalkingatonce.）一听到老师的声音,学生们立即停止讲话.

　　Notknowinghowtoworkoutthedifficultproblem,heaskedtheteacherforhelp.（原因状语,=Becausehedidn'tknowhowtoworkoutthedifficultproblem,heaskedtheteacherforhelp.）因为不知道如何解这道难题,他求助老师.

　　Studyinghard,you'llsucceed.(条件状语,=Ifyouworkhard,you'llsucceed.）如果你努力

　　学习,你会成功的.

　　Weighingalmostonehundredjinthestonewasmovedbyhimalone.（让步状语,=Althoughthestoneweightedalmostonehundredjin,itwasmovedbyhimalone.）虽然那块石头重将近一百斤,他一个人就把它挪动了.

　　Theircarwascaughtinatrafficjam,thuscausingthedelay.（结果状语,=Theircarwascaughtinatrafficjam,thusitcausedthedelay.）他们的车遇上交通阻塞,因而耽误了.