Kussaiynova Ж. ., and Samenova С. “The Concept of Modal Meaning in the Category of Negation”. Bulletin of L.N. Gumilyov Eurasian National University. PHILOLOGY Series, vol. 139, no. 2, Feb. 2023, pp. 42-48, doi:10.32523/2616-678X-2022-139-2-42-48.