Either you or he has to go there用就近原则怎么讲?为啥不用is?

Either you or he has to go there用就近原则怎么讲?为啥不用is?
Either you or he has to go there
用就近原则怎么讲?
为啥不用is?

Either you or he has to go there用就近原则怎么讲?为啥不用is?
就近原则就是按照靠近谓语动词的主语确定动词形式.因为he比较靠近,所以用has