The basic order of constituent morphemes in Shoshoni verbs is as follows: (Valence) - (Instrumental) - Stem - (Causative/Benefactive) - (Secondary Verb) - (Directional) - (Prefinal Aspect) - (Aspect) - (Imperative) - (Number) - (Subordination)Any verb form must include a verb stem, but other prefixes and suffixes may not be present, depending on the particular verb form.