Hi.<br/> This is such a difficult topic to me. Present Perfect. Can you please explain presnet perfect is used the this context?<br/><br/> I've played tennis twice.<br/> I've been to London twice.<br/><br/> Can't think of any "rule".<br/><br/> thanks a lot<br/><br/><br/> edit: another one. 546 people have died. I saw it on cnn during the tsunami.