No, she's not / No, she is not / No, she isn't

[ademoglu]

Hi,

I have difficulty in using short answers in negative sentence.

A: Is she coming?
B: No, she's not / No, she is not / No, she isn't.

I think all are OK. But I am not sure.

Thanks.

 

[konungursvia]

All are okay.

 

[Rover_KE]

I'd just say 'No'.