Can I ask a favour of you?

能请你帮个忙吗？

《牛津词典》

Can I ask you a favour?

我能请你帮个忙吗？

《牛津词典》

I've come to ask you to do me a favour.

我是来请你帮我一个忙的。

《柯林斯英汉双解大词典》

and the same for favour, they spell f-a-v-o-r, we put u in it,

同样地，对于发烧这个单词，他们拼写成f-a-v-o-r，我们要加一个u在里面，

美式英语和英式英语 - SpeakingMax英语口语达人

But Hewitt still needs a favour from Carlos Moya if he is to progress in Shanghai.

BBC: Hewitt sends Safin spinning out

Likely these companies are doing apple a favour and bringing more people into the tablet loop.

FORBES: The Most Important Question Facing Apple's New iPad Mini

Luctonians now hope local rivals Malvern can do them a favour by beating second-placed Broadstreet this weekend.

BBC: Lucs lose out at Peterborough