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 buy you lunch and you fix my computer. Is that a fair exchange ?

我请你吃午饭，你给我修计算机，这算是公平交易吧？

《牛津词典》

May I buy you a glass of beer?

我可以请你喝一杯啤酒吗？

youdao

I can come and visit you. I can buy you a ticket.

VOA: special.2010.04.12

I can take a heat pack, like the kind you buy at a pharmacy. Break it up. It gets hot.

买来的热装罐在里面打破,它就变热了。

麻省理工公开课 - 热力学与动力学课程节选

You know, I couldn't invite a hundred people and buy them all shoes, you know, to my daughter's birthday party, so

我不会请一百个人来参加我女儿的生日聚会，还给他们每人买双鞋，所以，

富家孩子的生日 - SpeakingMax英语口语达人

If I buy you, how much additional revenue, today and tomorrow, will that yield to me.

FORBES: Why Mergers Kill Customer Value

There are times when people feel like they can reach through the TV screen and say 'I own you, I know you because I buy a product you represent'.

BBC: John Daly hits back at players criticising Tiger Woods

If you find me, I'll buy you a coffee and we'll become friends.

BBC: Case of the missing travel photos