Are those horses?
No, they are not (aren't).
Is she a doctor?
No, she isn't (is not).
Is she happy?
No, she is not (isn't).
Is he a dentist?
Yes, he is.
Are they lawyers?
Yes, they are.
Is he sad?
No, he is not (isn't).
Is he an engineer?
Yes, he is.
Are these elephants?
Yes, they are.
Is that a watermelon?
Yes, it is.
Is he a CEO?
Yes, he is.
Are they students?
No, they aren't (are not).
Is that dog angry?
No, it (he/sheでもOK!) is not (isn't).
Is he a farmer?
No, he isn't (is not).
Is he a police officer?
No, he isn't (is not).
Is she a vet?
Yes, she is.
Are the baseball players famous?
Yes, they are.
Is that girl shy?
Yes, she is.
Is she a scientist?
Yes, she is.
Are these apples?
Yes, they are.
Is this a computer?
No, it isn't (is not).