为什么what is your name中be动词用is而不用are.那what （ ）I name?

为什么what is your name中be动词用is而不用are.那what （ ）I name? 英语中what is your name?中is为什么不用are而用is what is your name 中为什么用your what are you doing 为什么不说What IS your name? What's your name?为什么不是your name is what? is ,your,what,name what is your name what is your name? 为什么是what is your name 而不是what are your name What name is her name builing?为什么name在前面,不像what’s your name? i wonder that what your name is What is your name?为什么必动词用的是is,你不是第二人称吗?