Is this a cake?
No, it isn't.
Is this a study?
Yes, it is.
Is he smiling?
Yes, he is.
Is he angry?
Yes, he is.
Is this a dining room?
Yes, it is.
Is she scared?
Yes, she is.
Is this a slave?
Yes, it is.
Is this a dining room?
No, it isn't.
Is he worried?
No, he isn't.
Is he serious?
No, he isn't.