What are you doing为什么要加ing

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 为什麽be动词要用are what are you doing和what you are doing区别 can you tell me?what are you doing?合并为一句是 are you 还是 you are 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?