What are you doing?
I am emptying my cup.
Is this glass full?
No, it is empty.
What are you doing?
I'm reading.
Is this knife sharp?
No, it's not.
Is this knife sharp?
Yes, it is.
Do we need to sharpen this pencil?
No, we don't.
Do we need to sharpen this pencil?
Yes, we do.
What is he doing?
He is putting on his pants.
What is she doing?
She's taking off her shoes.
My TV is off. I need to...
...turn on my TV.
I'm tired. I need to...
...turn off my TV.
