cannot help后面加动名词时的意思是 情不自禁做某事。

后面加动词原形时的意思是 不能帮助做某事。

还有，不能起作用，无济于事的意思。

还可以加动词不定式。

扩展资料

I cannot help but often think of my parents.

我禁不住经常想到我的父母。

We cannot help but admit that the Chinese people are a great people.

我们不得不承认，中华民族是一个伟大的民族。

The happiness inside cannot help but show on the outside?

内在的欢喜会形于外吗？

I regret to say that I cannot help you this time.

我很抱歉地说，这次我帮不上你的忙。

I cannot help you doing your project.

我不能帮你做你的学习试验。