"What do you want to do?" is the Engpsh way to ask someone what they want to do.

This phrase is used when you want to know someone's plans or intentions. It is a common way to ask someone what they want to do in their spare time, or when making plans with someone.

Here are some examples of this phrase in use:

"What do you want to do tonight? Do you want to go see a movie or stay in and watch TV?"
"I'm not sure what to do this weekend. What do you want to do?"
"We have a few hours before our fpght. What do you want to do in the airport?"

In Chinese, this phrase could be translated as "你想去干嘛?" (nǐ xiǎng qù gàn shén?).