Question

formas negativas e interrogativas do verbo to be

Answer 1

Negativa:
I am not
He/she/it is not ou Isn't 
You/We/They are not ou aren't

Interrogativa:
Do I/you/we/they ...?
Does she/he/it ...:

Answer 2

Verbo to be: SER e ESTAR.

Só pra relembrar...
Formas afirmativas:
- I am beautiful.
- He is sad today.
- They are here now.

Negativa: apenas o NOT depois do verbo to be, ou seja:
- I am not (I'm not) beautiful.
- He is not (He isn't/He's not) sad today.
- They are (They aren't/They're not) here now.

Interrogativa: inverte a posição do verbo, exemplo:
- Am I beautiful?
- Is he sad today?
- Are they here now?