I am /
I'm very tall.
Am I very tall?
I am not /
I'm not very tall.
You are / you're shy. Are you shy? You are not / you aren't shy.
He is / he's funny. Is he funny? He is not / he isn't funny.
She is / she's pretty. Is she pretty? She is not / she isn't pretty.
It is / it's very old. Is it very old? It is not / it isn't very old.
We are / we're racing. Are we racing? We are not/ we aren't racing.
You are / you're twins. Are you twins? You are not/you aren't twins.
They are / they're cats. Are they cats? They are not/they aren't cats.