erkennen
			kennen
			verstehen
			wissen

As far as I know ...  to be in the know about  to come to know  Do you know a good club around here?  Do you know any?  Do you know how to get there?  Do you know how to get to Hotel Princesa?  Do you know if the museum is far from here?  Do you know something about that?  Do you know the area around Kiel?  Do you know the area around SF?  Do you know this area?  Do you know what you want?  Do you know where the Church of St. Marc is?  for all I know  to get to know  to get to know so.  I don't know whether I'm coming or going.  I don't know.  I don't know.  I know.  I want to know ...

know a lot  to know a lot  to know about  to know about sth  to know each other  to know how  know how to  to know how to handle sb  to know of  to know what's going on  know-how  know-it-all  to let know  to let me know  to let someone know  to let someone know sth  to not know  Not that I know of.  to be in the know  Why do you ask if you know?  would know  You know what?