状语从句与分词短语作状语的转换1.Astheyoungmanhadnothingtodo,hewentouttoplay.2.Yesterdaymysisterwenttobedlatebecauseshehadmuchhomeworktodo.3.Whentheyheardthegoodnews,theboydsshoutedhappily.4.WhenIstaye

　　状语从句与分词短语作状语的转换

　　1.Astheyoungmanhadnothingtodo,hewentouttoplay.

　　2.Yesterdaymysisterwenttobedlatebecauseshehadmuchhomeworktodo.

　　3.Whentheyheardthegoodnews,theboydsshoutedhappily.

　　4.WhenIstayedinHefei,Imadefriendswiththepeoplethere.

　　5.Ifyouturntotheleft,youwillseethenewhospital.

　　6.Beforeshehandedinthetestpaper,ourmoniterhascheckedtheanswers.把改过的从句部分发上来就行了,再帮我讲一下怎么改时态上