Endings.—The endings in the finite moods (357) show whether the subject is first, second, or third person; and indicate number and voice. See 462 ff.
a. The middle has a different set of endings from the active. The passive has the endings of the middle except in the aorist, which has the active endings.
b. The indicative has two sets of endings in the active and in the middle: one for primary tenses, the other for secondary tenses.
c. The subjunctive uses the same endings as the primary tenses of the indicative; the optative uses the same as those of the secondary tenses.