Verbs in the Hopi language are noteworthy for their very rich and expressive development of verbal aspects and voices. I shall say nothing in this paper of the nine voices (intransitive, transitive, reflexive, passive, semi-passive, resultative, extended passive, possessive, and cessative); and of the nine aspects (punctual, durative, segmentative, punctual-segmentative, inceptive, progressional, spatial, projective, and continuative) I shall deal with only two. It may be noted that there are no perfective and imperfective aspects; in fact Hopi does not in any way formalize as such the contrast between completion and in-completion of action. Its aspects formalize different varieties of the contrast between point-locus and extent-locus of phenomena, indifferently in time or space, or in both. Hopi also has three tenses: factual or present-past, future, and generalized or usitative. Hopi verbs belong to seven classes or conjugations having slightly different inflectional systems. Class 1, the largest and most creative class, contains a few categories not found in the other classes, among them the segmentative aspect.