- what is
- what has
- Informal what does: what's he want?
What's is defined as the contraction of what is, what has, or what does.
An example of what's is to ask the intended meal for supper, the current events or someone's occupation.
- What's he so upset about?
- That's what's been bothering me all this time.
- What's wrong with me?
- I don't know what's been bothering you lately, but if I've done something, I wish you would tell me.
- I'm a mess wondering what's wrong with me.