Langue française - Année 1995 - Volume 107 - Numéro 1 - Pages 36-42Annie BOONE : « La dichotomie synchronie-diachronie dans l'œuvre de Gustave Guillaume » G. Guillaume has never denied the interesting aspects of comparative and historical grammar, but he has denounced more than once its limitations and its insufficiences. He notes that the saussurian distinction between synchrony and diachrony « remains a bit sketchy ». He considers that historical grammar must extend its observations towards the history of systems, that is to say towards the diachrony of synchronies. For the distinction between synchrony and diachrony, he finally substitues a distinction between two diachronies : the diachrony of historical contributions and the diachrony of systematic relations. G. Guillaume insists on distinguishing, within the historical explanation, the retrospective point of view, which suffices to explain the morphological facts, from the prospective point of view, which enables to give an account of the structure of the system. 7 pages Source : Persée ; Ministère de la jeunesse, de l’éducation nationale et de la recherche, Direction de l’enseignement supérieur, Sous-direction des bibliothèques et de la documentation.