I think each one expresses a slightly different idea. Using "know" tells us that this is someone you stay in touch with. Using "knew" tells us that this is someone you don't stay in touch with and (probably) haven't been in touch with for a long, long time.
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ArvsworldI think each one expresses a slightly different idea. Using "know" tells us that this is someone you stay in touch with. Using "knew" tells us that this is someone you don't stay in touch with and (probably) haven't been in touch with for a long, long time.Thanks, Arvsworld.
Grammar GeekI agree completely with Arsvold.
If I'm in Rome and I see my next door neighbor, I will think it's amazing to run into someone I know. (I saw Bill the day before yesterday.)
If I'm in Rome and I see my old college roommate (which is only slightly more likely, because she was from Rome), I will think it's amazing to run into someone I knew. (I