Here, a verb is prefixed by a morpheme which encodes number and person of the subject. These prefixes come in two versions, realis and irrealis. Which one is chosen depends on whether the verb refers to an actual past or present event (realis), or merely to a possible or imagined event (irrealis).

Auxiliaries

Modal auxiliary verbs, such as the English words may, can, must, ought, will, shall, need, dare, might, could, would, and should, are often used to

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