posted by Miche .
Tu fais du sport.
I think this means "You do the sport" right?
What does du mean? And why is it used here? Can't it be le instead?
Salut! If you read the posting I answered first (above this) and study The Partitive, you should find your answer.
Tu fais du sport. = You do a sport. (RIGHT!)
This is an example of de + le sport which changes to "du" sport.