someone/some one

someone 只能指人,而 some one 既可指人,也可指物。另外,some one 可以跟 of 短语连用,而 someone 却不能跟 of 短语连用,因此,不能说 someone of them。请对比下列实例:

1. Is someone coming this afternoon? (Eckersley) 今天下午有人来吧?

2. Will some one of you not help me? (SE) 你们之中没有人愿意帮助我吗?