“Continuous Forms of the English Verb: Origin, Stages of Development”. The Journal of V.N. Karazin Kharkiv National University. Series: Foreign Philology. Methods of Foreign Language Teaching, no. 93 (September 12, 2021): 31–36. Accessed October 25, 2026. https://periodicals.karazin.ua/foreignphilology/article/view/17732.