Extended Strong's Greek Lexicon (Abbott-Smith based)
if
Usage: ἐάν, contr. fr. εἰ ἄν, conditional particle, representing something as "under certain circumstances actual or liable to happen," but not so definitely expected as in the case of εἰ with ind. (Bl., §65, 4; cf. Jhn.13:17, 1Co.7:36), if haply, if; __1. with subjc. (cl.); __(a) pres.: Mat.6:22, Luk.10:6, Jhn.7:17, Rom.2:25, 26 al.; { __(b) aor. (= Lat. fut. pf.): Mat.4:9 16:26 (cf. ptcp. in Luk.9:25; M, Pr., 230), Mrk.3:24, Luk.14:34, Jhn.5:43, Rom.7:2, al.; = cl. εἰ, with opt., Jhn.9:22 11:57, Act.9:2; as Heb.
אִם = ὅταν, Jhn.12:32 14:3, I Jhn.2:28 3:2, Heb.3:7" (LXX) . __2. C. indic, (as in late writers, fr. Arist. on; see WH, App., 171; VD, MGr. 2, App., §77; Deiss., BS, 201f., LAE, 155, 254; M, Pr., 168, 187; Bl., §65, 4); __(a) fut.: Mat.18:19 T, Luk.19:40, Act.7:7; __(b) pres.: 1Th.3:8 (see Milligan, in l.). __3. With other particles: ἐ. καί (Bl., §65, 6), Gal.6:1; ἐ. μή (M, Pr., 185, 187; Bl., l.with), with subjc. pres., Mat.10:13, 1Co.8:8, Jas.2:17, 1Jn.3:21;
aor., Mat.6:15, Mrk.3:27, Jhn.3:3, Rom.10:15, Gal.1:8 2:16 (see Lft., Ellic., in ll.); ἐ. τε . . . ἐ. τε, [in LXX for אִם . . . אִם, Est.19:13, al.,] Rom.14:8. __4. = cl. ἄν (which see) after relat. pronouns and adverbs (Tdf., Pr., 96; WH, App., 173; M, Pr., 42f.; Bl., §26, 4; Mayser, 152f.; Deiss., BS, 202ff.): ὃς ἐ., Mat.5:19, Mrk.6:22, 23 Luk.17:32, 1Co.6:18, al.; ὅπου ἐ., Mat.8:19; ὁσάκις ἐ., Rev.11:6; οὗ ἐ., 1Co.16:6; καθὸ ἐ., 2Co.8:12; ὅστις ἐ., Gal.5:10. (AS)