Сердюк, Вікторія Миколаївна, and Анна Володимирівна Котова. 2018. “Constructions Be + Participle II and Have + Participle II in the Process of Developmentof Category of Retrospective Coordination in English”. The Journal of V.N. Karazin Kharkiv National University. Series: Foreign Philology. Methods of Foreign Language Teaching, no. 86 (March), 131-36. https://doi.org/10.26565/2227-8877-2017-86-17.