EN
The aim of the article is to present the main theses of Parmenides in a formalized language including 3-argument predicate D as a primitive term. Term D is interpreted as a ternary relation of action between events. Apart from the predicate D, the vocabulary of the proposed language involves the vocabulary of the language of classical propositional logic and basic terms of non-fregean logic: non-fregean identity and quantification bounding propositional variables. This language is explicitly eventistic in its character. It has already found numerous applications in analyses concerning eventistic ontology in a strict line. Realisation of the described project allowed the authors to examine and expose the expressive power of their language. It occurred that the standpoint of ontological monism may be adequately reconstructed in a language including the concept of action between events.