The class / small (?)
Is the class small?
She / sad (?)
Is she sad?
Is the umbrella pink?
No, it isn't.
Are they sad?
No, they aren't.
She / sad (-)
She isn't sad.
The umbrella / green (-)
The umbrella isn't green.
The horse / white (+)
The horse is white.
She / a teacher (+)
She is a teacher.
The boy / at school (-)
The boy isn't at school.
We / happy (+)
We are happy.
They / friends (+)
They are friends.
The dog / black (+)
The dog is black.
Is the man at the park?
Yes, he is.
The bag / big (?)
Is the bag big?