I'll be eternally grateful to you for this.

我将为此永远感激你。

《牛津词典》

I will be deeply grateful to you for your kindness for the rest of my life.

您对我的恩情使我终身铭记。

youdao

We all have something to be grateful for but we don't realize it.

我们都拥有值得感激的东西，但我们没有认识到这一点。

youdao

Whereas it is the duty of all nations to acknowledge the providence of almighty God, to obey his will, to be grateful for his benefits, and humbly to implore his protection and favor and whereas both houses of Congress have by their joint committee requested me "to recommend to the people of the United States a day of public thanksgiving and prayer to be observed by acknowledging with grateful hearts the many signal favors of Almighty God, especially by affording them an opportunity peaceably to establish a form of government for their safety and happiness."

VOA: special.2009.11.23

They taught us to be humble and to be grateful for everything we had.

WHITEHOUSE: Town Hall with Students in Mumbai

And Secretary Solis was right there, the first one to sign up to go, as a busy Secretary, still never too busy to give back to an amazing group of girls -- and I will be grateful to her for a very long time for her outstanding work and willingness to step up and outside of her role.

WHITEHOUSE: The White House

Investors are right to be grateful to Congress for not plunging the US into an entirely avoidable downturn.

BBC: Cliffhanger: Still hanging