Where are my pens?请问这句为什么不用IS而用are?

Where are my pens?请问这句为什么不用IS而用are? 请问您My eyes are black.为什么用are而不用is谢谢 Where are you from为什么用are不用is My favourite food is noodles.为什么noodles是复数,而前面确用is不用are? how are lucy and tony.这句话为什么要用are而不用 is? These are my pens同义句 These pens _______ 为什么用who is it 而不用who are you? Where are the pens?还是 Where are pens? where are you from?为什么用are不用do? where are the black pens. where is your pens 和 where are your pens哪个对? 英语单选题Three months is a long time for me .句中为什么用is而不用are?Ther