I'll be eternally grateful to you for this.

我将为此永远感激你。

《牛津词典》

She is eternally grateful to her family for their support.

她因家人的支持对他们永存感激之心。

《柯林斯英汉双解大词典》

She was grateful to him for being so good to her.

她很感激他对她这么好。

《柯林斯英汉双解大词典》

Jackson was grateful for Van Buren's help, and asked him to come to Washington to serve as secretary of state.

VOA: special.2009.01.01

But I think for anybody who wants to think a little bit out of box, what counts is the chance to try something, and I guess that's what I'm most grateful for in my career.

但我觉得只要你想要,打破陈规思考问题，你最好能尝试做一些事情,所以我在事业中最为感恩的。

普林斯顿公开课 - 人性课程节选

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

Leaving out Veterans ( Who I am forever grateful to for your service ) most people DO NOT know anyone killed by gun violence.

FORBES: Despite Outrage And Grief, Irrational Gun Rights Restrictions Won't Prevent Senseless Violence

The US, for its part, couldn't be more grateful to Moscow for lending a helping hand.

CENTERFORSECURITYPOLICY: Obama's new world order and Israel

We also discussed the peace process and the upcoming peace consultative jirga in Kabul, for which, Mr. President, I am grateful to you for your support and very kind advice.

WHITEHOUSE: President Obama and President Karzai Press Availability