I cannot go back because of what they did to me.

因为他们的所作所为，我不能回家。

youdao

I cannot go back in time to undo what I did, but there is willingness to correct a mistake.

我不能回到以前，我所在的事情已经无法挽回，但是我愿意去改正我的错误。

youdao

See here, I am limping and have blisters on my feet from walking here. I cannot possibly go back again.

你看，我是个跛子，为了走到这儿来，我脚上已经打起泡来了，不可能再走回去。

youdao

"I feel pain in my heart. I cannot go back because of what they did to me.

VOA: special.2009.10.24

That's why we need Ben Bernanke to continue the work he's doing, and that's why I've said that we cannot go back to an economy based on overleveraged banks, inflated profits, and maxed-out credit cards.

WHITEHOUSE: President Obama Nominates Ben Bernanke for Chairman of the Federal Reserve | The White House