To help 我们应该尽力去帮助别人, to引导的目的状语We should do sth to help ，只是这里用了竭尽所能来修饰而已。as much as we can 竭尽所能/尽力
We should do as much as we can help other people我们应该尽我们所能帮助其他人Can 为情态动词，情态动词后接动词原形
help 情态动词 后 动词原型
