one的用法：
none 与 no one / nobody 及 nothing的用法区别
no one / nobody 常用来指人，作主语时谓语动词要用单数形式；nothing 常用来指物，作主语时谓语动词也要用单数形式；none 可指人也可指物，作主语时，如和 of 连用指不可数名词时，谓语动词要用单数形式；指可数名词时，谓语动词用单、复数均可。如：
No one likes a person with bad manners.
Nothing is difficult in the world if you put your heart into it.
None of them has / have seen me before.
None of this money belongs to me.