Thus, when you throw a ball upward, gravity is pulling the ball in the direction opposite its motion and gravity does negative work on the ball.
(you; throw upward; a ball) (gravity; is pulling; the ball; in the direction opposite its motion and gravity; T:when you throw a ball upward)
you gravity
throw upward is pulling
a ball
the ball in the direction opposite its motion and gravity T:when you throw a ball upward