I isn't flying to New York City.
I am not flying to New York City.
I be windsurfing.
I am windsurfing.
It is rainning.
It is raining.
We are throw a ball?
Are we throwing a ball?
They're rowling.
They're rowing.
He's fensing.
He's fencing.
He's railing a horse.
He's riding a horse.
She's swiming.
She's swimming.
We are bakeing cookies.
We are baking cookies.
She aren't danceing.
She isn't dancing.