what are you doing?中的are為什么不用is?什么时候用are或is.

what are you doing? What are you doing? what are you doing What are you doing? WHAT ARE YOU DOING? what are you doing? what are you doing和what you are doing区别 what are you doing now, what are you doing?翻译 what are you doing here what+are+you+doing是什么意思 What are you doing there? What are you doing there? what are you doing?today what are you doing中文 what are you people doing? what are you doing?译 Then,what are you doing