I will do everything in my power to help you.

我将尽全力帮助你。

《牛津词典》

I will do everything possible to help you.

我将尽一切可能帮助你。

youdao

I will do everything to help you whatever happens.

不管发生什么事，我一定尽一切可能来帮助你。

youdao

I can't tell you everything that we will do, but I know you will like it.

我不能全部透露给你，但你肯定会喜欢的。

When 实战 - SpeakingMax英语口语达人

"I will do everything in my power to be world number one, " said Ferrero.

BBC: Roddick takes top spot

And in the weeks ahead, I will do everything in my power to make them a reality.

WHITEHOUSE: Now Is The Time to Take Action Against Gun Violence

And I will do everything in my power as President to help.

WHITEHOUSE: President Obama Makes a Statement on the Shooting in Newtown, Connecticut | The White House