This root form (lemma) is used in 3 different forms in the NT: ὑπηρέτησαν (IAA3··P), ὑπηρετήσας (PAA·NMS), ὑπηρετεῖν (NPA····).
It is glossed in 3 different ways: ‘having attended’, ‘to_be attending’, ‘attended’.
OET ACTS 13:36 Greek word=ὑπηρετήσας (hupaʸretaʸsas) Morphology=PAA·NMS English gloss=‘having attended’ SR GNT ACTS 13:36 word 6
OET ACTS 20:34 Greek word=ὑπηρέτησαν (hupaʸretaʸsan) Morphology=IAA3··P English gloss=‘attended’ SR GNT ACTS 20:34 word 17
OET ACTS 24:23 Greek word=ὑπηρετεῖν (hupaʸretein) Morphology=NPA···· English gloss=‘to_be attending’ SR GNT ACTS 24:23 word 19