En presente simple:
"Fred has a red rubber ball. He kicks the ball. It flies through the air. He picks it up. He throws it against a wall. The ball comes back to Fred. He kicks it with his foot again. The ball flies over the wall. He picks it up again. He bounces it on the street. The ball bounces up and down. The it stops bouncing up and down. It doesn't move. Fred's dog barks at the ball. Fred kicks the ball. His dog runs after the ball."
En presente perfecto:
"Fred has had a red rubber ball. He has kicked the ball. It has flown through the air. He has picked it up. He has thrown it against a wall. The ball has come back to Fred. He has kicked it with his foot again. The ball has flown over the wall. He has picked it up again. He has bounced it on the street. The ball has been bounced up and down. Then it has stopped being bounced up and down. It hasn't moved. Fred's dog has barked at the ball. Fred has kicked the ball. His dog has run after the ball."
