Tense in Ontonian can be expressed by an auxiliary "tai" (was) for the past tense and "ien" (will be) for the future tense. Alternatively an ending ("-tai" or "-ien" respectively) can be added to the verb
Using auxiliary verbs to express tense is more common for the future tense, whereas for the past tense usually the ending is used.
To express passive voice, an auxiliary "vy" (or "tai", "ien" for respective tenses) is used in combination with the past tense form of the verb (always with the ending "tai"). This way the subject is the one the action is being performed upon. To specify the agent, an object with preposition "on" (of) is used