This document discusses a webinar on modal verbs in English presented by Antonina Korobeynikova. The webinar covers the basic uses and functions of common modal verbs like can, could, may, must, should, and others. It explains that modal verbs are used to express ideas like probability, ability, obligation, permission, habits, and more. The document provides examples for how each modal verb is used in different contexts. It also includes interactive exercises asking the reader to identify the correct modal verb for different sentence prompts.