I 'am - ja jestem
You are - ty jesteś
She is - ona jest
He is - on jest
It is - ono (to) jest
We are - my jesteśmy
You are - wy jesteście
They are -oni są

Am I ? - czy ja jestem
Are you ? - czy ty jesteś
Is she ? - czy ona jest
Is he ? - czy on jest
Is it ? - czy (ono) to jest
Are we ? - czy wy jesteście
Are you ? - czy oni są

I am not ( = I'm not )
You are not ( = You aren't )
He is not ( = He isn't )
She is not ( = She isn't )
It is not ( = It isn't )
We are not ( = We aren't )
You are not ( = You aren't )
They are not ( = They aren't )