what are you doing 为什么不说What IS your name?

what are you doing 为什么不说What IS your name? 为什么说What's your name ,而不说What are your name? what are you doing?what is you name? what is your name?为什么不可以说成waht name are you what are you doing 为什么不是is? 为什么是what is your name 而不是what are your name What is your name =What ( ) you what is your name 能转换 who are you What is your name?How old are you? What's your name?为什么不是your name is what? What is your hobby?一句,主语是不是your ,如果是your,为什么不说 What are your 是what is you name 还是what are you name