In this paper, we propose a unified account of the semantic polyfunctionality of the present progressive in English (involving temporal, aspectual, and modal usage types) in terms of epistemic contingency or non-necessity. More specifically, by means of a corpus-based study of spoken American English we show how the observed modal usage types can be derived, directly or indirectly, from this
... [Show full abstract] construction's most schematic meaning, which we argue is modal as well. This analysis is carried out within the framework of Cognitive Grammar (Langacker 1987, 1991), which provides both the conceptual analytical tools and the theoretical assumptions underlying the analysis.