翻译:你要干什么(up to)

1楼不对.

就是 What are you up to?

类似的用法还有
I am on to it. 他正在忙这件事
I will be after. 我来搞定

2楼的也欠正确哦,
What's up, man/mate/buddy/pal/dude/buds/friend/guy?
标准的很随便的问话,有时可以比较挑衅. 你想怎样?!

What are you up to？ （Man)?

另外还可以说what are you doing ？

后面不能加do.加了do就不是这个意思了。

What are you up to？

后面不能加do。

what's up to ?man

what are you doing

What are you up to do?