advantage, benefit, profit

advantage 常指一种使某人处于比其他人相对有利的地位，机会或时机。

如：He had the advantage of good education. (受过良好的教育对他十分有利。)

profit 多指报偿或报偿性的收入。

如Did you make any profit last year? (你去年赚钱了吗?)

benefit 指物质利益或精神方面的好处。

如：I get no personal benefit from the business.(我个人从这家企业中并不获益。)