Verbs are inflected for either direct object or indirect object (but not for both simultaneously) by suffixes. The categories of person of subject, tense, aspect, and mood are marked simultaneously with a formative which is either a verbal prefix or a proclitic depending on analysis. These proclitics can also precede nonverbal predicates. The dialects of Toluca and Ixtenco distinguish the present, preterit, perfect, imperfect, future, pluperfect, continuative, imperative, and two subjunctives. Mezquital Otomi has additional moods. On transitive verbs, the person of the object is marked by a suffix. If either subject or object is dual or plural, it is shown with a plural suffix following the object suffix. So the structure of the Otomi verb is as follows: