Anne DALADIER: The original adverbial caracter of the indo-european genitive case, extractions, possessive pronouns, anaphoric le and grammaticalized interpretations in French nominal The use of various morphological pronouns inside distributional oppositions such as: constraints on the possessivation of de N, constraints on Qu- extraction in contexts where the clitic en is allowed, constraints on anaphoric le in sentences where an explicit anaphoric genitive son is allowed, extends concrete and abstract values of source and membership of the indo european genitive case while discriminating very sharply the new values. Extraction properties also renew in some sense the adverbial original caracter of the genitive case. These extensions and différenciations of grammaticalized values take place inside two syntactic uses of de. De can occur as a discontinuous morpheme of a noun operator where it is grammaticalized inside the argumentai relationship of this noun with its arguments. De can also occur as a lexical operator, expressing various concrete and abstract possessive values and governing arguments, having or not argumentai structures.