Modal verbs vs modal copula verbs

The article is devoted to the problem of the identity and difference of modal components of the analytical predicate: the modal verb and the modal copula-verb. The modal values of these components, their role in the organization of the predicate, as well as the compatibility of different modal values within a single predicate are analyzed. It is argued that the phenomena in question cannot be identified because they differ functionally and semantically. The novelty of the research is determined by the reference to the question of the compatibility of the modal verb and the modal copula verb. The difference of the functions implies their free combination in one nominal predicate. However, restrictions on their compatibility are conditioned by the typical value of the sentence, subject to semantics, specific modal meaning of the verb and the copula.