but 引导从句

我们几乎没有人愿意帮助他。

可以做that理解。

there are few of us but wish to help them
这句话有错

there are few of us but we wish to help them
there are few of us who wish to help them
这样就可以

but引导定语从句，相当that或who dont

个人认为是让步状语从句