Judging from the expression on his face,he had failed the dr

一般来说,-ing形式表示主动、进行；过去分词表示被动、完成。主语He和judging的关系是主动的。-ing形式作状语,可以表示时间、原因、结果、条件、让步、行为方式、伴随状况等。如：Being a teacher,you should help your students in every way。（原因）Seeing my parents waving in the crowd,I went running to them。（时间；方式）Listening to English every day （If you listen to English every day）,you’ll learn it well step by step。（条件） 再问： 本题呢 求解