I had to check out the actual Rob Ford interview to figure out how “the ball did the crack” correlated. Rob Ford admitted that he did (past, implying a single event) crack, but objects to being asked if he does (current/recurring, and as Rob Ford implies that it implies, addiction) crack. He finally answered “do you smoke crack?” with “Yes, I have smoked crack”, but has everybody really been asking/accusing him only of smoking crack (present tense), and not of having smoked crack (past tense)?