What là gì?

Tính từ
- Cái gì?
- Điều gì?
- Muốn gì?
- Vật gì?

Trạng từ
to what extent?.
what does it matter?
used to indicate an estimate or approximation.
see you, what, about four?
used for emphasis or to invite agreement.
pretty poor show, what?

Đại từ
asking for information specifying something.
what is your name?
the thing or things that (used in specifying something).
what we need is a commitment
(in exclamations) emphasizing something surprising or remarkable.
what some people do for attention!

Mạo từ
asking for information specifying something.
what time is it?
(referring to the whole of an amount) whatever.
he had been robbed of what little money he had
(in exclamations) how great or remarkable.
what luck!

What?, What!, what?, What, what is your name, so what, what else, what ever, what is up, what a pity, what about, for what, no matter what, what if