Are the boys playing chess?
Yes, they are.
Is the zebra playing with the ball?
No, it isn't.
Is the girl dancing?
Yes, she is.
Are the crocodiles walking?
No, they aren't.
Is the man cooking?
Yes, he is.
Are the monkeys sleeping?
Yes, they are.
Is the lizard eating?
No, it isn't.
Are the women talking?
Yes, they are.
Is the camel drinking water?
Yes, it is.
Are the girls singing?
Yes, they are.