Which of the following two sentences is correct?
- It's been long time since I last saw you.
- It's been long time since I have seen you.
closed as off topic by MετάEd, J.R., Mahnax, Matt E. Эллен♦, tchrist Aug 28 '12 at 23:52
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The correct one is:
Reason: The event "last saw you" happened once, sometimes in the past, where it already ended. Today, you're only describing how much time has passed since that event.
Another example would be: