HI all, I've always used since + past tense, as opposed to present perfect. So far, it's been good. However, I have recently come across this article on BBC Learning English that says: Link to article (I'm a new member so I can't post link) "bbc.co.uk/worldservice/learningenglish/grammar/learnit/learnitv174.shtml" The part that explains about the usage of present perfect isn't that clear to me. Can anyone help shed a light on this? Thanks.