How do i say what are you doing in chinese mandarin?

There are a few ways to say "What are you doing?" in Chinese Mandarin, depending on the context and formality:

Formal:

* 你在做什么？ (nǐ zài zuò shénme?) - This is the most literal translation and is the most common and polite way to ask.

* 您在做什么？ (nín zài zuò shénme?) - This is even more formal and respectful, used for elders or someone you want to show extra respect to.

Informal:

* 你在干嘛？ (nǐ zài gàn ma?) - This is more casual and is commonly used among friends and family.

* 你在忙什么？ (nǐ zài máng shénme?) - This literally means "What are you busy with?" and can be used to ask what someone is currently doing, especially if you think they might be busy.

Other options:

* 你干什么？ (nǐ gàn shénme?) - This is similar to "你在干嘛?" and is also informal, but can sound a bit more direct or even accusatory depending on the tone.

Note:

* The tone of your voice will also play a role in how the question is interpreted.

* When speaking, you'll need to use the appropriate tones for each word.