Easy question for the experts. I introduced my wife to my Czech Language interest group last night. She is half Czech. I said "je pul cesky" and was quickly corrected by the fluent Czech speakers "pul ceska" My grammer book states that pul is followed by the genitive case (case 2). Did I make a mistake and indicate that she is a 'he' (I know the difference between -y and -ka) or was I correct? Thanks.