Donohue, Gautam & Pokharel (2014) argue that Kusunda lacks an unambiguous means of negating declarative verbal main clauses, with the suffix marking a more general
irrealis, with negation as one of its possible functions, contrary to the analysis in Watters et al. (2006), which had described several negative verbal suffixes, such as .
Imperative clauses do distinguish polarity unambiguously, with the suffix
-go for commands and
-nin for prohibitives:
Nonverbal predicates can also be clearly negated, using the negator
otoq ('is not') for identity or the negative existential
qaʕ-u ('does not exist') for existence: For non-imperative verbal clauses, however, no dedicated negative morpheme exists. What Watters et al. (2006) had analyzed as negative suffixes, such as
-aʕu and
-daʕu, are reanalyzed by Donohue et al. as combinations of the nominalizing suffix
-da (expressing a "manifest characteristic") with the negative existential
qaʕ-u. The resulting construction literally asserts the nonexistence of a nominalized property. For example: Two pieces of evidence support the reanalysis. First, the clitic
-ba ('also, even') can be inserted between the nominalized verb and the negative existential, indicating a word boundary rather than a single suffix. Second, the construction is incompatible with future time reference, which follows from the semantics of
-da, since it refers to an already-realized characteristic. To express negation in future contexts, the only available strategy is the
irrealis suffix
-u, but this is inherently ambiguous between positive and negative readings: This situation is typologically unusual, since most known languages have some unambiguous way of negating verbal predicates across all tense contexts. ==Proto-language==