Are the friends at school? (-)
No, they aren't.
Are you from England? (-)
No, I'm not.
Are his parents from Italy? (-)
Now, they aren't.
Are you 12? (+)
Yes, I am.
Is he a teacher? (+)
Yes, he is.
Are we students? (+)
Yes, we are.
Is the dog in the garden? (-)
No, it isn't.
Is she nice? (+)
Yes, she is.
Am I your friend? (+)
Yes, you are.
Is your school bag black? (-)
No, it isn't.