Can I buy you lunch in return for your help?

感谢你帮忙，我请你吃午饭好吗？

《牛津词典》

I starve for your help in such condition.

在这样的情况下我急切渴望得到你的帮助。

youdao

I'll need your help in it.

我需要你的帮助。

youdao

She found an envelope in the jar with the message: "I hope this money will help you and your family in these rough times."

VOA: special.2010.02.05

The most altruistic behavior of all, giving your life to help another, can be explained in cold-blooded evolutionary terms.

最利他的行为，就是为他人牺牲自己，这也可以用毫无人情味的进化论来解释。

耶鲁公开课 - 心理学导论课程节选

and how using your knowledge of math can help you solve something in biology.

如何用数学方面的知识解决生物方面的问题。

与教授的面谈 - SpeakingMax英语口语达人

Let the people in your life help you.

FORBES: Cancer Made Me Nice: An Interview With Survivor Karen Vaniver, MD

When you checked in, someone kindly circled your placement in order to help you find your spot.

WSJ: Cardinals, Quarterbacks, and the Terminator

She can assist you in identifying your problem areas, develop strategies to help you reach your financial goals, assist you in setting priorities, save you time by researching investments and help you make money with your investments.

FORBES: Invest in Yourself and Live Financially Independent