Men who (οιτινες). "The very ones who."

Have erred (ηστοχησαν). "Missed the mark." First aorist active indicative of αστοχεω, for which see 1. Timothy 1:6; 1. Timothy 6:21.

That the resurrection is past already (αναστασιν ηδη γεγονενα). Second perfect active infinitive of γινομα in indirect assertion after λεγοντες (saying) with the accusative of general reference (αναστασιν).

Overthrow (ανατρεπουσιν). See Titus 1:11.