Is it funny?
Yes, it is.
Are they friends?
Yes, they are.
Are they students?
Yes, they are.
Is she happy?
No, she isn't
Is it hungry?
Yes, it is.
Is he three years old?
No, he isn't
Is she a singer?
No, she isn't
Are they happy?
Yes, they are.
Are they sad?
No, they aren't
Is she sleepy?
Yes, she is.
Is she a teacher?
Yes, she is