any of 和 any 有什么区别：
Tom rarely writes to any of his friends.
这儿的any of his friends 和 any his friend 有哪些差别?
any没有名词解释阿,为何会有所在关系的`of?
any与his都是中位限定词，中位限定词相互抵触。即一个名词前最多仅能有个中位限定词。
因此，我们可以说 any friends, his friends, 但是不能说any his friends 或者 his any friends.
any of his friends中，any是代词做主语，of his friends做后置定语，表明整体与部分关系。
any books 任意书籍 (书籍没有限制范畴）
any of the books （在限制范畴的这些书里的任意一本）