1.Having nothing to do,the young man went out to play
2.Having much homework to do,yesterday my sister went to bed late.
3.Hearing the good news,the boys shouted happily.
4.Staying in Hefei,I made friends with the people there.
5.After turning to the left,you will see the new hospital.
6.Our monitor handed in the test paper after checking the answers.（原句有语法错误:check the answer发生在handed in之前,不能用现在完成时,应该是过去完成时had checked,表示“过去的过去”）
将主动语态的状语从句改写成分词短语,基本上是：1.认出从句 -- 2.去掉从句引导词和主语 -- 3.找到动词谓语并将其改写为ing形式 -- 4.用逗号隔开它和主句 -- 5.主句保留原样.
将被动语态的从句改为分词短语,比较简单,多数情况下,是去掉从句连接词和主语,将动词改为过去分词-ed形式就行了,表示被动含义.
注意两点：1.从句的主语是名词时,用它取代主句的主语,如第一句中的the young man
2.不是所有的联结词都一定要去掉,如需要动作先后连接的时候,使用before后者after；while有时也会保留.
不难,下回是着自己做.