Ms. Green is a doctor.
Ms. Green isn't a doctor.
You are thirsty.
You aren't thirsty.
She has a fish.
She doesn´t have a fish.
I have a bird.
I don't have a bird.
There is a sofa.
There isn't a sofa.
We live in Moscow.
We don't live in Moscow.
I play the guitar.
I don´t play the guitar.
They work in a café.
They don't work in a café.
They have bikes.
They don´t have bikes.
She likes fish.
She doesn't like fish.
There are two windows.
There aren't two windows.
He likes salad.
He doesn't like salad.
She sings.
She doesn't sing.
This is a man.
This isn't a man.
There is a table in the room.
There isn't a table in the room.