It is well-known that languages differ with respect to whether or not they allow True Negative Imperatives (TNIs). In this talk, we present negative (in)effability in imperatives from Bangla (Indo-Aryan), which bans negation in immediate imperatives, but allows it in deferred imperatives. We first show that negative (in)effability in the language does not map onto the morphology based true-surrogate divide observed in literature. Secondly, we evaluate existing approaches to negative (in)effability to rule out (i) all negation-centric approaches, syntax-semantics or phonology based, as well as (ii) phonology based imperative-centric approaches for Bangla. This leaves the syntax based imperative-centric approaches as the best fit for Bangla since we want a correlation between properties of imperatives (i.e. immediate vs. deferred) and negative (in)effability.
