Célia Regina dos Santos Lopes is Associate Professor at the Federal University of Rio de Janeiro (Brazil). Her teaching and research interests are historical sociolinguistics and grammaticalization in the pronominal system of Brazilian Portuguese. In 2018, published, in Brazil, the book Mudança Sintática das Classes de Palavra: Perspectiva Funcionalista by Contexto Editora (co-edited with Ataliba Castilho). Other recent publications include two chapters published in “The Handbook of Portuguese Linguistics” released by Wiley-Blackwell (“History and Current Setting” and “Main Morphosyntactic Changes and Grammaticalization”).