状语从句与分词短语作状语的转换
1.As the young man had nothing to do ,he went out to play.
2.Yesterday my sister went to bed late because she had much homework to do.
3.When they heard the good news,the boyds shouted happily.
4.When I stayed in Hefei,I made friends with the people there.
5.If you turn to the left,you will see the new hospital.
6.Before she handed in the test paper,our moniter has checked the answers.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