In this talk, I present a syntactic-based model of Tense and aspect in complementation as well as some adverbial clauses. Since notions such as “Tense” or “(Non-)Finiteness” have proven to be rather difficult to define, I will first separate morphological, syntactic, and semantic uses of these notions. As a consequence, we will see that various mismatches arise, and one aim of this talk is to understand these mismatches. The perspective taken is a syntax-first view where mismatches between form ...