Context: Somebody calls me from a party, it's loud on the other end. I say: Sounds like you are having fun there! I know that when hangzik or tűnik is used with a noun we just add "-nek/nak" - It sounds like fun. (Hangzik mulatságnak.) But if we use a verb - It sounds like you are having fun; It sounds like you are running; etc. What structure is there in such a case?