is和does的区别为什么where does he livelive不能用lives 为什么用does什么情况用do

为什么where does he live
live不能用lives 为什么用does
什么情况用do 什么情况用is
句子的谓语如果是行为动词/实义动词充当, 那么句子需要用does 或者do 的形式,反之用be（am,is , are) 形式.
(1) He lives in Beijing
He doesn't live in Beijing
Does he live in Beijing ?
Where does he live ?
因为前面已经有does 了后面行为动词必须还为原形.
(2) She is a worker
She is not a worker
Is she a worker ?
What is she ?

还原成陈述句 he lives in ... 单三 疑问句 用 does ，动词变原型
主语是你我我们他们的时候用do。
she is cute .动词是be动词，疑问句用be动词