I know. He knows.
I don't know. He doesn't know.
Do you know? Does he know?
I think. He thinks.
I don't think. He doesn't think.
Do you think? Does he think?
I listen to music. He listens to music.
I don't listen to music. He doesn't listen to music.
Do you listen to music? Does he listen to music?
I watch TV. He watches TV.
I don't watch TV. He doesn't watch TV.
Do you watch TV? Does he watch TV?