一.把下列状语从句转换成--ing分词状语
1.Whenhecameintotheoffice,hefoundnoonewasin.
2.Becausehewasill,helefttheschoolearlierthanusual.[来源:学+科+网Z+X+X+K]
3.Ifhepassesthetest,hewillenterthearmy.
4.Althoughheisalittleboy,hesavedagirlintheriver.
5.Thebuswasheldupbythestorm,soitcausedthedelay.