According to an aspectological model proposed by Kabakčiev in 1984, later developed and sophisticated, languages differ according to whether they mark aspect (perfectivity and imperfectivity) on verbs, as in the Slavic languages – among others, or through nouns/NPs featuring (non-)boundedness which is transferred onto verbs, as in the Germanic languages – among others. In this model of compositional aspect (CA), Bulgarian is a borderline case with a perfective-imperfective and an aorist-imperfect distinction and a definite article only (no indefinite), and the model is used to analyze Greek, a language exhibiting identical features. NP referents play a major role for the compositional explication of aspect. The study finds that Greek is of the same borderline/hybrid type of language as Bulgarian, featuring verbal aspect (VA) predominantly, but also peripherally CA. The aorist/imperfect distinction exists both in Greek and Bulgarian to offset the structural impact of the definite article. Analyzed are some conditions for the explication of CA in Greek and they are found similar to those in Bulgarian. However, there are specificites and differences between the two languages that must be further studied and identified. Keywords: verbal aspect, compositional aspect, definite article, article-aspect interplay, aorist-imperfect contrast

This study deals with an issue that is significant in view of the buildup of word morphological structure, something frequently neglected by investigators, viz., morphemes encoding specific grammatical meanings of Bulgarian participles, which indicate in a specific way why participial forms belong to a separate lexeme class. Of course, there are authors who have discussed participial morphostructure (Pashov 1976, Vatov 1992, Kutsarov 2012, Kutsarov, I. 2007, Aleksova 2012, etc.). However, almost all of them (save Kutsarov, K. 2012, 2019) interpret the grammatical function of participial morphemes through the prism of the verb, i.e., if the participle is part of the verb form composed. Thus the study sets two basic goals: to describe the morphemic classification of Bulgarian participles according to their traditional description in the verb paradigm; to analyze relational and classification morphemes that belong to participles – morphemes that differentiate participles from adjectives and verbs.