He isn't dancing.
Incorrect
She is sleeping.
Correct
They are eating.
Correct
They aren't sleeping.
Correct
She is drinking water.
Incorrect
She is talking.
Incorrect
He is singing.
Correct
They aren't reading.
Correct
He is writing.
Correct
He is listening to music.
Correct
They're doing homework.
Incorrect
She is drawing.
Correct
They aren't singing.
Correct
They aren't singing.
Correct
They are playing.
Correct
She is talking.
Correct
