... expressed via the modal verbs can, may, must in English and the equivalent expressions in Vietnamese Aims of the study This study - A contrastive analysis of the meanings expressed via the modals can, ... contrastive analysis of the meanings expressed via the modal verbs can, may, must and the equivalent expressions in Vietnamese Semantically, the English modals can, may, must express the notion of ability, ... modal verbs in English and in Vietnamese Chapter two is focused on investigating the meanings expressed by can, may, must and on contrastive analysis of the meanings expressed by can, may, must and...