David Alan Black Chapter 23 - Subjunctive Mood

ἄν

(A particle adding an element of indefiniteness to a clause)

ἐάν

if (used with subjunctive)

ἐὰν μή

except, unless (used with subjunctive)

εἰ

if (used with indicative)

ἵνα

that, in order that (used with subjunctive)

ὅπως

that, in order that (used with subjunctive)

ὅταν

whenever, when (ὅτε + ἄν; used with subjunctive)

πάλιν

again

πῶς

how?

ὡς

as, about