Аннотация:In his study A. Guryev examines variation in yes/no questions by providing an analysis of 1,259 interrogative structures extracted from about 4,600 text messages of the Swiss SMS French Corpus. Recent studies carried out on corpora of spoken European French have all revealed the massive use by speakers of the variant preserving the subject-verb order (SV Tu as des cours ?), the relatively rare use of the est-ce que variant (ESV Est-ce que tu as des cours ?) and the virtual absence of the variant formed by subject clitic inversion (V-Scl As-tu des cours ?). However, like any other type of computer-mediated communication, texting is generally characterised by a set of parameters associated with both oral and written genres: the author shows that in the SMS data V-Scl is preferred to ESV and may even be used in the same text message with SV. Convinced that variation phenomena should be framed within a multidimensional approach (i.e. in terms of interplay between various linguistic and extralinguistic factors), the author focuses here on the role of morphosyntactic parameters which can affect the choice of yes/no interrogative variants. Based on the analysis of the collected data, it is possible, according to the author, to distinguish two types of linguistic environment: low-variability vs. high-variability environments. While the first one includes all syntactic contexts favouring the massive use of SV, the second type covers contexts which are relatively neutral in the selection of variants, as is the case for constructions with modal verbs or non-clitic arguments.