Abbott-Smith Manual Greek Lexicon
ὅταν (G3752)
123 ὅταν (for ὅτ’ ἄν = ὅτε ἄν ), temporal particle , with a conditional sense, usually of things expected to occur in an indefinite future; prop., whenever ; c. subjc. praes.: Mt 6:2 , 5 , Mk 14:7 , Lk 11:36 , Jo 7:27 , Ac 23:35 , I Co 3:4 , al.; ἕως τ. ἡμέρας ἐκείνης, ὅ. , Mt 26:29 , Mk 14:25 ; seq. τότε , I Th 5:3 ; c. subjc. aor. (M, Pr. , 185): Mt 5:11 , Mk 4:15 , Lk 6:22 , Jo 2:10 8:28 (Field, Notes , 94), 10:4 , al. As in Hom. (LS, s.v.), but not in cl. prose, c. indic., when (M, Pr. , 167 f.; Bl., § 65, 9): c. impf., Mk 3:11 (cf. Ge 38:9 , al.); c. praes., Mk 11:25 ; c. fut., Re 4:9 (Swete, in l.); c. aor., Mk 11:19 , Re 8:1 (Swete, in ll.; M, Pr. , 168, 248; Field, Notes , 35).
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain