Number of verbal inflectional categories
Verbal inflectional categories are grammatical features marked by the use of a distinct verb form, triggered at least in part by the grammatical environment.1 This parameter considers the number of independent verbal inflectional categories in the given language, not the number that can simultaneously appear on a single verb form.2
Types:
ConjCat=0: The language does not have verbal inflection.
ConjCat=X: Number of verbal inflectional categories is x.
1: For this parameter, synthetic morphemes simultaneously expressing person and number should be counted as two separate grammatical features, since distinct forms are required to express any change in person or number.
2: The most common verbal inflectional categories are person and number; time, aspect, and mood; agreement, status (realis–irrealis), polarity (affirmative–negative) illocution (declarative, interrogative, imperative), and voice. Less frequently occurring inflectional categories include collective marking, inversion, honorifics, target quantification, focus, transitivity, reciprocity (as a feature of agreement), argument markers, object classifiers, non-specific referent marking, scope, deixis, movement, causatives (if relevant to the context). TAM should only be counted as a single unit if these features are not grammatically distinct in the given language.