390 The noun χρή need, by the usual omission of ἐστι, appears like an impersonal verb in the pres. ind. 3d sing., there is need, one ought, Lat. oportet. By crasis with ἦν, ᾖ, εἴη, εἶναι, ἔσται are made χρῆν and (with an extra augment) ἐχρῆν, χρῇ, χρείη, χρῆναι, χρῆσται.