L’alternance si / aussi dans l’expression du comparatif d’égalité: Facteurs d’évolution en moyen français

This article focuses on the diachronic study of equative constructions in Middle French. We concentrate particularly on distinct evolutions of two functional elements : the parameter marker (si / aussi alternation) and the standard marker (que / comme alternation). We try to determine relevant factors of change, observing especially semantic types of predication (actualized vs non actualized predicates)