求语法好的同学帮解释下此句的所有语法结构：
问题描述：
求语法好的同学帮解释下此句的所有语法结构：
Isn't there anything that could be better than two affectionate people that can trust and understand each other?
答
that could be better than two affectionate people that can trust and understand each other是个定语从句,修饰anything
that can trust and understand each other也是个定语从句,修饰people