Following a pattern common among Papuan languages [Foley, W. A., 1986, 'The Papuan Languages of New Guinea', Cambridge University Press, p. 182ff.], many verbal roots in Nimboran exhibit alternate forms whose use is determined by the number of the verb's subject. A root has at most three such allomorphs, corresponding to the distinction between singular, dual and plural [...]. I will refer to these allomorphs as the S(in)g(ular), the Du(al) and the Pl(ural) roots. [...] Sg roots are used when the subject is semantically singular (or inclusive dual, marked by the IncDuSubj in the modifier); Du roots are used when the subject is dual, Pl roots are used when the subject is plural.
- Inkelas (2004), a pag.285-286