And you? Còn …?

Còn followed by a person turns the question back to them: Em khỏe. Còn anh? I'm well. And you? It saves repeating the whole question, and it's the natural thing to say once you've answered.

It works with things as well as people, and then means "what about …?": Cái này ba mươi ngàn. Còn cái kia? This one is thirty thousand. And that one?

The answer gives the same information about the new person: Em tên là Vy. Còn chị? Chị tên là Lan.

You'll often hear thì sao added at the end: Còn em thì sao? What about you?

Inside a longer sentence, còn moves from one person to another, like "while" or "and": Tôi uống trà, còn chồng tôi uống cà phê. I drink tea, and my husband drinks coffee.

Còn also means "still" or "left": Anh còn ở đây không? Are you still here? Còn cái này không? Do you still have this one? You'll hear that one in shops, often answered Hết rồi, all gone.