Question

They may start as a group of high-school students

They may start as a group of high-school students, for whom practising their music in someones house is the first step to fame。 start 和 as在句子作啥成分，怎样理解？for 和 whom呢？

Answer 1

may start 谓语动词，may情态动词表可能性，后接动词原型start，as介词，此处表示＂作为＂，后接名词，名词通常表示身份等。for whom 引导非限制性定于从句，前有逗号与主句隔开，定于从句的先行词是students，人，所以从句引导词优先选用who或whom，因为此处引导词作介词for的宾语，所以可以用whom这种宾格形式。

这句话拆分后就是：They may start as group of ...students. For those students, practicing their music .....to fame.

整句话译为：也许，他们刚刚起步时只是一群高中生，对他们来说（for whom 的理解），在屋里排练歌曲就是成名的第一步。