Word: 干嘛 (gànmá)

你在北京都干嘛了？

Nǐ zài Běijīng dōu gànmá le?

What did you do in Beijing?

你干嘛走来走去？

Nǐ gànmá zǒu lái zǒu qù?

Why do you keep walking around like that?

你干嘛这样？

Nǐ gànmá zhèyàng?

Why are you being like this?

你明天要干嘛？

Nǐ míngtiān yào gànmá?

What are you doing tomorrow?

你说这个干嘛？

Nǐ shuō zhège gànmá?

What did you say that for?

干嘛？

Gànmá?

You what? What are you doing?

干嘛一直担心这个？

Gànmá yìzhí dānxīn zhège?

What's the point of worrying about it all the time?

这个东西是干嘛的？

Zhège dōngxi shì gànmá de?

What's this thing for?