SINAGA, B.; LUMBAN RAJA, V.; GINTING, F. Y. A. ERROR ANALYSIS ON THE USING BE OF SIMPLE PRESENT AND SIMPLE PAST TENSES AMONG THE SEVENTH GRADE STUDENTS OF SMP NEGERI 2 NAINGGOLAN. Kairos English Language Teaching Journal, [S. l.], v. 3, n. 3, p. 208–223, 2020. DOI: 10.54367/kairos.v3i3.841. Disponível em: https://ejournal.ust.ac.id/index.php/KAIROS/article/view/841. Acesso em: 3 jul. 2024.