I'll see what I can do but I can't promise anything.

我会去看看能做什么，但不能给予任何承诺。

《牛津词典》

I can't promise anything, but I'll do what I can.

我不能许诺什么，但会尽力而为。

《牛津词典》

What beyond His faithful promise, would I wish or do I need?

除了祂可靠的应许，我还有什么需求和愿望呢？

youdao

And if you don't kill us I'll do my best to protect you.'" Swan has kept the promise, his eyes opened to environmental problems made worse by a warming climate.

VOA: standard.2009.12.10

That's what's critical, is making sure that we're always there to bequeath that gift to the next generation. (Applause.) And if you'll work with me, I promise I'll do everything I can -- (applause) -- I'll do everything I can to help protect our economy but also protect this amazing planet that we love and this great country that we've been blessed with.

WHITEHOUSE: President Obama Speaks at Conference on Conservation

And I promise you we will do better.

WHITEHOUSE: THE WHITE HOUSE

Okay, I promise that's the last pirate voice I'll do.

NPR: Summary Judgment: 'A Scanner Darkly,' 'Pirates of the Caribbean,' 'Once in a Lifetime'