THE PECULIARITIES OF TEACHING SINGULAR AND PLURAL NOUNS IN ENGLISH AND RUSSIAN CLASSES IN MIDDLE SCHOOL. Educ-21st-Century [Internet]. 2023 Jun. 23 [cited 2026 Jan. 22];5(1):154-63. Available from: https://journals.ysu.am/index.php/Educ-21st-Century/article/view/10338