1.I seem to have met you before,are you local / are you from out of town?
2.I should have seen that girl before,it's just that I couldn't remember her name.
3.You look familiar,I can't recall where I might have met you.
4.I am not familiar with her,this is the first time I've seen her.
5.We just met and we are trying to get to know each other.лл??????????? should have seen.should have done ????????????????????????? ????????? ?????? ?????????????ɡ?лл ???? couldn't remember....???????????eɡ???could ???????????????????????