one的用法：
none 與 no one / nobody 及 nothing的用法區別
no one / nobody 常用來指人，作主語時謂語動詞要用單數形式；nothing 常用來指物，作主語時謂語動詞也要用單數形式；none 可指人也可指物，作主語時，如和 of 連用指不可數名詞時，謂語動詞要用單數形式；指可數名詞時，謂語動詞用單、復數均可。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.