翻译“你在忙什么?”用英语

what are you doing?
what ary you busy with?
What are you bustling about

What are you doing?

你在忙什么是咱们中国人的客气的说法，其实就是你在干什么的意思！没有busy的意思。

What's up? 或 What's new? 这两个是最地道最标准最纯正的翻译.英语国家的人们都这样说.
楼上的当然也都可以，但有点Chies-English...

What are you bustling about

what's going on?
How's going?

what are you busy?