whoever 可以用来做宾语从句而no matter who是不行
另外为了起了强调,可以用whoever来做句子的主语
no matter who 只能引导从句
在状语从句中whoever=no matter whoNo matter who comes here first,please open the window.Whoever comes here first,please open the window.在名词性从句中只能用whoeverI will give my money to whoever is kind to my son.