Modal verbs in Bulgarian grammar are auxiliary verbs that express necessity, ability, permission, or possibility. They are used in combination with a main verb to provide additional information about the verb’s action, such as obligation or ability. In Bulgarian, some common modal verbs include “мога” (can), “трябва” (must), and “искам” ( want). As a learner, practicing with modal verbs will help you fully grasp their usage in various sentence structures.