句子分析 关于 介词+whom的句子

问题描述:

句子分析 关于 介词+whom的句子
They may start as a group of high-school students,for whom practising their music in someone's house is the first step to fame.这句话里for whom 是修辞那个?为什么要加介词 for?

对于.来说for a group of high-school students,practising their music in someone's house is the first step to fame