1 (laugh?)
Is she laughing?
No, she isn't.
She's crying.
2 (eat?)
Is the dog eating?
Yes, it is.
It's eating.
3 (cook?)
Are they cooking?
No, they aren't.
They are reading newspapers.
4 (ski?)
Are they skiing?
No, they aren't.
They are swimming.
5 (dance?)
Are they dancing?
Yes, they are.
They are dancing.
6 (fly?)
Is it flying?
Yes, it is.
It's flying.