A.T. Robertson Commentary Acts 4:37

"having a field, sold it, and brought the money and laid it at the apostles` feet." — Acts 4:37 (ASV)

Having a held (υπαρχοντος αυτω αγρου). Genitive absolute with present active participle of υπαρχω and dative of possession.

Sold it and brought (πωλησας ηνεγκεν). Aorist active participle of πωλεω and second aorist active indicative of φερω because a single definite instance. So also with εθηκεν (laid), first aorist active.