There are many young men who are for him.其中解释一下who怎么在定语从句中做的主语?

问题描述:

There are many young men who are for him.其中解释一下who怎么在定语从句中做的主语?

There are many young men who are for him.其中解释一下who怎么在定语从句中做的主语?
因为who are for him句中的who=many young men先行词.who做are的主语.
句意是:“有许多支持他的人”.