关系代词不同。
当代词 those 后接定语从句时，定语从句通常用关系代词who来引导。
如： Those who earn most pay most tax. 挣钱最多的人交税也最多。
Thanks are due to all those who helped. 向所有帮过忙的人表示感谢。
Thanks are due to all those who took part. 向所有参加的人表示感谢。
We kept seats for those who might arrive late. 我们给可能来晚的人留了座位。
先行词为all,everything,anything,nothing,none,little,few,much等不定代词时.
eg.You must do everything that I do.
先行词被all,every,no,any,little,much,some,just等修饰时.
eg.Is there any question that troubles you much
当先行词被序数词或形容词最高级以及the only,the very,the last等修饰时.
eg.James is the best singer that I have ever known.