This paper investigates the semantics of tense and aspect in Romance languages. Its goal is to develop a compositional, model-theoretic semantics for tense and temporal adverbs which is sensitive to aspectual distinctions. I will consider durative adverbial distributions and aspectual contrasts across different morphological tense forms. I will examine tense selection under habitual meanings, generic meanings and state of result constructions. In order to account for these facts I will argue that temporal homogeneity plays a fundamental role in tense selection (...) in Romance languages. (shrink)