ARE YOU FROM london 为什么用ARE不用IS

ARE YOU FROM london 为什么用ARE不用IS Where are you from为什么用are不用is where are you from?为什么用are不用do? Meimei:__1__ __2__!Are you from london?. Where are you from?为什么用“are”? 为什么用who is it 而不用who are you? what nationality are you 中的are 为什么不用is啊 Good morning mr green( )are you from?( )from london.where( ) 为什么Lucy with her friends is(be)from Jpan用is而不用are? 为什么用Are you tourists?而不用Are you tourist? how old are you 为什么要用are而不用is you are a good girl中间为什么用are 而不用is?