εἰ, conjunctive particle, used in conditions and in indirect questions. I. Conditional, if; 1. with indic, expressing a general assumption; (a) pres.: before indic, pres., Mt 11,14, Rz 8,25, al.; before imperat., Mk 4,23; 9,22, J 15,18, 1 Kor 7,9, al.; before fut. indic., Łk 16,31, Rz 8,11, al.; before pf. or aor., with negation in apodosis, Mt 12,26, Rz 4,14, al.; similarly, before impf., Łk 17,6, J 8,39; before quæst., Mt 6,23, J 5,47; 7,23; 8,46, 1 P 2,20; (b) fut.: Mt 26,33, 1 P 2,20; (with) pf.: J 11,12, Rz 6,5, al.; (d) aor.: Łk 16,11; 19,8, J 13,32; 18,23, Ap 20,15, al. 2. Where the assumption is certain = ἐπεί: Mt 12,28, J 7,4, Rz 5,17, al. 3. Of an unfulfilled condition, with indic, impf., aor. or plpf., before ἄν, with imp. or aor. (see: ἄν, I, i). 4. C. indic., after verbs denoting wonder, etc., sometimes, but not always, coupled with an element of doubt: Mk 15,44, 1 J 3,13, al. 5. C. indic., as in LXX (Lb 14,3o, 1 Sm 14,45, al. = Heb. אִם), in oaths, with the formula of imprecation understood in a suppressed apodosis (WM, 627; Burton, §272): Mk 8,12, Hbr 3,11" (LXX) 4:3 (LXX). 6. Rarely (cl.) with optative, to express a merely possible condition: Dz 24,19; 27,39, 1 Kor 14,10; 15,37, I Pe3:14, 17. II. Interrogative, if, whether. 1. As in cl., in indir. questions after verbs of seeing, asking, knowing, saying, etc.: with indic. pres., Mt 26,63, Mk 15,36, Dz 19,2, 2 Kor 13,5, al.; fut., Mk 3,2, Dz 8,22, al.; aor., Mk 15,44, 1 Kor 1,16, al.; with subjc. aor. (M, Pr., 194), Flp 3,12 2. As in LXX (= Heb. אִם and interrog. הֲ, Rdz 17,17, al.; see WM, 639f.; Viteau, i, 22), in direct questions: Mk 8,23 (Tr., WH, txt.), Łk 13,23; 22,49, Dz 19,2, al. III. With other particles. 1. εἰ ἄρα, εἴγε, εἰ δὲ μήγε, see: ἄρα, γε. 2. εἰ δὲ καί, but if also: Łk 11,18 but even if, 1 Kor 4,7, 2 Kor 4,3; 11,16. 3. εἰ δὲ μή, but if not, but if otherwise: Mk 2,21.22 J 14,2, Ap 2,5, al. 4. εἰ καί, if even, if also, although: Mk 14,29, Łk 11,8, 1 Kor 7,21, 2 Kor 4,16, Flp 2,17, al. 5. καὶ εἰ, even if, see: καί 6. εἰ μή, if not, unless, except, but only: Mt 24,22, Mk 2,26; 6,5, J 9,33, 1 Kor 7,17 (only), Ga 1,19 (cf. ἐὰν μή, 2:16; see Hort., Ja., xvi); ἐκτὸς εἰ μή, pleonastic (Bl., §65, 6), 1 Kor 14,5; 15,2, 1 Tm 5,19. 7. εἰ μήν = cl. ἦ μήν (M, Pr., 46), in oaths, surely (Ez 33,27, al.): Hbr 6,14. 8. εἴ πως, if haply: Dz 27,12, Rz 1,10. 9. εἴτε . . . εἴτε, whether . . . or; Rz 12,6-8, 1 Kor 3,22; 13,8, al. (AS)