Overview

Active verbs are those where the subject, expressed in the nominative case, does something.

The teachers instruct the students.

Passive verbs are those where something is done to the subject.

The students are instructed by the teachers.

If there is an agent in the sentence, then they are expressed using the ablative case. So:

The students are instructed
no agent
discipuli docentur

The students are instructed by the teachers
agent = teachers
discipuli magistris docentur

These verbs follow the same basic rules as regular active verbs, but take a separate set of endings.

The basic endings are: -r, -ris, -tur, -mur, -mini, -ntur. These are added on to the same patterns as for active verbs.

View summary of verb forms and how to translate them
Tense Mood Active Translation Passive Translation
Present Indicative opto I desire optor I am desired
Imperfect Indicative optabam I was desiring optabar I was being desired
Perfect Indicative optavi I (have) desired optatus sum I have been desired
Pluperfect Indicative optaveram I had desired optatus eram I had been desired
Future Indicative optabo I shall desire optabor I shall be desired
Future Perfect Indicative optavero I shall have desired optatus erim I shall have been desired
Present Subjunctive optem opter
Imperfect Subjunctive optarem optarer
Perfect Subjunctive optaverim optatus sim
Pluperfect Subjunctive optavissem optatus essem