The document is a presentation by Mr. Parveen Kumar from the Department of International Foundation Studies at Amity University Tashkent about modal verbs. It defines modal verbs as auxiliary verbs that indicate modality or attitude, and lists examples of different types of modality expressed by modal verbs, including ability, obligation, prohibition, permission, advice, and possibility. It also notes that modal verbs give sense of mood to actions and provides examples of modal verbs expressing ability, permission, advice, obligation, possibility/prediction, and certainty.