This study of the SBW pronominal and TAM system is based on personal data collected in Nigeria on 8 languages : Zaranda, Langas, Dir, Danche, Baraza, Dott, Sigidi and Zaar. In their pronominal system, these languages have lost the gender, inclusive/exclusive and dual marks characteristic of AfroAsiatic (AA) languages. They have in common a system that has eroded and realigned to the point that (i) the exponents of persons are the same in the plural and the singular ; (ii) number is expressed by specific elements: a change of tone, a -N suffixed to the pronoun or addition of a suffix to the verb. It should be noted that the AA feminine mark *t- has become the general common mark for the 3s pronouns. As far as TAM systems are concerned, Zaar ...