I can't help to do such stupid thing.

我不能帮着做这样愚蠢的事。

youdao

He can't help to do housework, for he is busy.

他由于忙不能帮助干家务。

youdao

I can't help to do the housework since I haven't finish my paper.

我不能帮忙做家务了，因为我的论文还没有完成。

youdao

We can't help understanding. We always already understand, which has nothing to do again with whether or not we're right or wrong.

我们控制不住地去理解，我们总是已经理解了，这与对错无关。

耶鲁公开课 - 文学理论导论课程节选

You want to use the "so ~ that" pattern to help you explain why you can or can't do something.

使用 “so ~ that”句型可以帮助你解释你能够或者不能够做某事的原因。

so that 课堂 - SpeakingMax英语口语达人

And we've learned a great deal about what we can do -- and shouldn't do -- to help rebuild and revitalize our cities and metropolitan areas for the future.

WHITEHOUSE: Talking Jobs with America��s Mayors

Knowing what's to come, we can't help but do the same.

WSJ: Ayrton Senna | Aggression With Lucidity | By Richard B. Woodward

We just ask that, if there's any way possible, tell the people when they get here to be patient--we're all doing all that we can--and be ready to volunteer to help us get this stuff off the trucks 'cause we can't do crowd control and get the stuff off the trucks as well.

NPR: Gulfport Takes Stock of Disaster