I fully understand the value of what you are driving at, but frankly, the narrative as it now stands simply will not support a more general or hopeful conclusion.

但你的提议太含糊不清，说实话，你说的,无助于更好的结局。

耶鲁公开课 - 1945年后的美国小说课程节选

You use "I can't help but" when you feel helpless, when you want to get something across that needs to happen.

当你觉得无助时，或者当你说明需要做到这件事情的时候，你就可以使用“I can't help but”句型。

I can't help but 课堂 - SpeakingMax英语口语达人

And so you feel helpless until you notice that there is, off to the right, a side track and at the end of that track, there is one worker working on the track.

你极为无助,直到你发现，在轨道的右侧，有一条侧轨,而在侧轨的尽头，只有一名工人在那施工。

耶鲁公开课 - 公正课程节选