what is she doing这里为什么用is?

what is she doing这里为什么用is? what is she doing? What is she doing? What she is doing? 曲别? what is she doing in 这里为什么要用There she is. What is she doing for vacation?为什么要用for额? 为什么是what is she doing for vacation.而不是what does she do for v How is Mary?What's she doing? What is she doing 怎么回答 what is she doing?课文翻译是什么 What is she doing?翻译成中文 what is she doing this morning?