both.and...什么和什么两者都...,谓语动词要用复数形式.
而neither...nor...既不.也不.,或者什么和什么两者都不.其谓语动词要采用"就近原则"即就是谓语动词的人称形式要由nor后面的人所决定.
例如:Neithre I or Tom wants to buy the book.
Neither the teacher or the students want to go on walking.