Hi! Alexander,   
      
   On 04/18/2016 03:07 PM, you wrote to All:   
      
    ak> "What happened to/with you?"   
      
    ak> I saw both variant in books. Is there any difference?   
      
   There isn't a major difference.  Except maybe in terms of context.   
      
   The "to" variant might be as a result of some external affliction pertaining   
   to the person being spoken to.  Perhaps an injury?  To which, the usual   
   (joking) response is "you should see the other guy".   
      
   OTOH, the "with" query might be that the other person has missed a meeting, or   
   didn't attend a party.  Even then "to" could work.   
      
   It's a very fine 'line'.  Either will work in most situations.   
      
   Cheers,   
   Paul.   
      
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