1、分词做表语通常表示主语所具有的特征，如the film we saw yesterday was really moving，再如， they were excited on hearing the news
3、分词作状语实际上就是一个并列句或状语从句的省略，并对句子稍做改动，如When asked about it , she s锾攒揉敫aid she knew nothing，这句话等同于when she was asked about it , she said she knew nothing
5、现在分词的完成时（having done)主要用于状语从句，强调分词的动作发生的谓语动作之前。简单的说如果状语的时态是完成时，在省略时，也用分词的完成时
