THANH, Cong, Nguyen. Problems and Solutions for Enhancing Awareness of Tense, Aspect, and Modality in Teaching and Learning English in Vietnam. Journal of Knowledge Learning and Science Technology ISSN: 2959-6386 (online), [S. l.], v. 2, n. 3, p. 63–75, 2023. DOI: 10.60087/jklst.vol2.n3.p75. Disponível em: https://jklst.org/index.php/home/article/view/46.. Acesso em: 17 sep. 2025.