帮助分析一下there's a lot of money to be saved.句子结构

其实这个句型并不好,容易出错,应该直接用
A lot of money is to be saved.
因为 there be 是倒装句 相当于 A lot of money (主语) is （系动词） there （表语）.所以 系动词的单复数由主语而定,即 there be 句型中 be 的单复数由后面的名词而定.
如果加上 to be saved,可以理解为目的状语.To be saved,there's a lot of money.
而也可以理解为 定语修饰 A lot of money,即 A lot of money to be saved is there.
个人认为理解为定语,句子更紧凑,更合适.