PENWILL, Kathryn. Focussing on Conditional Sentences. TESL Canada Journal, [S. l.], v. 2, n. 2, p. 79–85, 1985. DOI: 10.18806/tesl.v2i2.466. Disponível em: https://teslcanadajournal.ca/index.php/tesl/article/view/466. Acesso em: 4 may. 2024.