... called modal verbs or modal auxiliaries. The modal auxiliaries such as can, could, may, might, will, would, must, should and ought to express different types of modal meanings. These modal auxiliaries ... two types ofmodality: epistemic and deontic modality. Epistemic modality is concerned with matters asknowledge and belief, expressing judgments about states of affairs. Deontic modality, onthe ... analysis of the modal meanings expressed via can, may, must in English and the equivalent expressions in VietnameseAs mentioned in the part 2.1 (Conventional meanings of English modals can, may, must),can...