Fernanda Pratas is a Postdoctoral Researcher at the Linguistics Center of the University of Lisbon. Her main research interests are the diachronic and dialectal variation of Portuguese and Cape Verdean, as well as the expression of tense, aspect and modality across languages.Sandra Pereira is a Postdoctoral Researcher at the Linguistics Center of the University of Lisbon. She has worked in corpora annotation in different research projects, and her main research interests are dialectal and diachronic variation, syntactic parsing, and lexicography. Clara Pinto is a PhD student and Researcher at the Linguistics Center of the University of Lisbon. Her main research interests are the evolution of negation across languages, metalinguistic negation, diachronic variation, and syntactic parsing.