1、what are you doing?意思是你在干什么?
2、例句:(1)what are you doing,mon?I need your help.你在干什么妈妈?我需要你的帮助。(2)what are you doing?How can you see?你在干什么?你怎么能看得见?
3、what are you doing?是特殊疑问句,what are you后要加动词的ing形式。例如:(1)What are you drinking?你在喝什么呢?(2)What are you waiting for?你在等什么?