This document discusses modals in English grammar. It provides examples of common modal verbs like can, may, must, should and would and their meanings for expressing ability, permission, obligation, advice and conditional statements. Modal verbs are different from other verbs in that they do not change form or have infinitives or participles. Modal verbs give information about the function of the main verb they govern and have communicative functions on a scale from possibility to necessity, including epistemic modality about the possibility of propositions, deontic modality about freedom to act, and dynamic modality about one's own ability or willingness to act.