someone:某一個
anyone：任何一個人
某一個人可以做成某件事情,但是不是任何一個人都可以完成那件同樣的事情
Someone in my class knows how to speak Spanish. 班里有個人可以講西班牙語.
Anyone in my class knows how to speak Chinese. 班里的任何一個人可以講漢語.
If anyone in my class knows how to speak Chinese, then you can always find someone in my class who can speak Chinese. 如果班里的任何一個人都可以說中文,那么你總會從我們班里找到個會說中文的人.
If someone in my class knows how to speak Spanish, it does not mean that anyone in my class knows how to speak Spanish. 如果班里有個人會說西班牙文,這并不代表我們班里的任何一個人都會說西班牙文.