KEEFE, Karin. An Introduction to English Sentence Structure: Clauses, Markers, Missing Elements. TESL Canada Journal, [S. l.], v. 32, n. 2, p. 115, 2015. DOI: 10.18806/tesl.v32i2.1213. Disponível em: https://teslcanadajournal.ca/index.php/tesl/article/view/1213. Acesso em: 20 apr. 2024.