The document discusses modal verbs in English. It defines modal verbs as special verbs that express mood and attitude. Some key points:
- Modal verbs such as can, may, must are used with other verbs to express ideas like ability, permission, obligation.
- Modal verbs are irregular and do not conjugate like normal verbs. They have consistent forms and are always followed by a base verb.
- Common modal verbs include can, could, may, might, must, should, would, shall, will. Each has specific meanings and uses for ability, permission, requests, advice, necessity and more.
- Modal verbs are important for proper English grammar and have many functions in the language