He's happy.
He isn't happy. He's sad.
They are sad.
They aren't sad. They are happy.
They are hot.
They aren't hot. They are cold.
She is cold.
She isn't cold. She is hot.
It is light.
It isn't light. It is heavy.
It is heavy.
It isn't heavy. It is light.
It is thin.
It isn't thin. It is thick.
They are the same.
They aren't the same. They are different.
They are different.
They aren't different. They are the same.
They are big.
They aren't big. They are small.
It is small.
It isn't small. It's big.
It is nice.
It isn't nice. It's dangerous.
It is dangerous.
It isn't dangerous. It's nice.
He is hungry.
He isn't hungry. He is sleepy.
