She _____ (not - riding) a bike.
She isn't riding a bike.
We _____ (not - study) Science.
We aren't studying Science.
They _____ (not - dance).
They aren't dancing.
We _____ (not - speak) Portuguese.
We aren't speaking Portuguese.
She _____ (not - read) a book.
She isn't reading a book.
He _____ (not - walk) the dog.
He isn't walking the dog.
I _____ (not - sleep) now.
I'm not sleeping now.
I _____ (not - eat) pizza.
I'm not eating pizza.
They _____ (not - play) volleyball.
They aren't playing volleyball.
He _____ (not - listen) to music.
He isn't listening to music.