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?