This paper aims to analyze the cognitive-semantic properties of Greek preverbs derived from ancient Greek prepositions and proposes a vocabulary teaching method utilizing them. Vocabulary acquisition plays a crucial role in foreign language learning, yet traditional methods often rely on simple interpretation or context-based understanding, leaving learners to fill in knowledge gaps independently through dictionary use. In this study, a method for mastering preverbs derived from ancient Greek prepositions to enhance modern Greek vocabulary is presented. These morphemes, evolved from ancient Greek prepositions into modern Greek preverbs, are paired with various verbs, primarily those with spatial connotations. The focus centers on 15 preverbs: anti-, apo-, dia-, eis-, en-, epi-, kata-, meta-, para-, peri-, pro-, pros-, syn-, yper-, and ypo-. The usage of these preverbs in vocabulary construction is analyzed, and they are employed for instructional purposes. Each preverb’s semantic domain is delineated, accompanied by a schematic representation to aid learners in conceptualization by establishing a central meaning. By engaging in conceptualization, learners can grasp preverb meanings, comprehend new vocabulary utilizing these preverbs, and progressively expand their vocabulary to encompass peripheral meanings associated with each preverb.

This study proposes how to teach aspectual derivations of the verb in the Russian language based on the prefixation and suffixation. The author argues that for the intermediate/advanced learners the traditional aspectual pair system needs to be replaced by the aspectual cluster system and the derivations of the imperfective verbs through the suffixation needs to be taught based on the classification of the infinitives. The hierarchical structure of verb stem in Russian is as follows: superlexical prefixes (po-, etc.) > -yva- > superlexical prefixes (ot-, etc.) > intermediate prefixes (do-, pere-) > -nu-/-a- > lexical prefixes > stem. The study also proposes that the syntactic structure needs to contain the split AspPs (PerfP1 > ImpfP > PerfP2 > PerfP3) outside of the vP and another AspP inside the vP in order to derive the above-mentioned hierarchical structure.