如Where does a bird live?为什么live不能用单三形式?

如Where does a bird live?为什么live不能用单三形式? Where does a bird live? Where does a snake live? 为什么不能用where are you live,要用where do you live? where do panda live?还是where does panda live?为什么? 为什么 Where does your pen pal live live后面不加in where does she live Where does she live? where does kangaroo live? where does Amy live? where does he live 为什么不是 where does he lives? where does a panda live?怎么回答