Constructions expressing the separation of a part from the whole which arose independently on the two ends of the Slavic land are presented in the article. The analyzed phenomena, resulting from interference of Slavic and non Slavic languages (Greek and German), are relevant to some South Slavic and Kashubian dialects. The semantic structure of these constructions is proposed and it is shown how their relevant semantic features are expressed in sentences. One of them is the definiteness of the object from which a certain part is detached. It is concluded that Bulgarian and Macedonian on the one hand and Kashubian dialects on the other are characterised by similar level of details expressing the semantic structure of the analyzed sentences despite different grammatical structures of these languages.