A.T. Robertson Commentary Luke 13:3

"I tell you, Nay: but, except ye repent, ye shall all in like manner perish." — Luke 13:3 (ASV)

Except ye repent (εαν μη μετανοητε). Present active subjunctive of μετανοεω, to change mind and conduct, linear action, keep on changing. Condition of third class, undetermined, but with prospect of determination.

Ye shall perish (απολεισθε). Future middle indicative of απολλυμ and intransitive. Common verb.