Improving Students’ Tenses Mastery Through Substitution Drill. Seltics Journal: Scope of English Language Teaching Literature and Linguistics, [S. l.], v. 1, n. 1, p. 53–62, 2018. Disponível em: https://ejournals.umma.ac.id/index.php/seltics/article/view/47. Acesso em: 19 aug. 2025.