On Suppletion, Selection, and Agreement

In Hopi and Papago, Uto-Aztecan languages of the American Southwest, some verbs occur in suppletive pairs for number. The members of such pairs are selected in accordance with the number category associated with a direct argument of the verb — i.e., the subject or object. In Hopi, the number category relevant to verbal suppletion may be expressed as the feature opposition [± plural].