This article discusses the syntactic features of Russian speech at the level of a simple sentence of two generations of Russian-German bilinguals: native speakers of the inherited Russian language at the age of 10-15 years old, born in Germany or arrived in Germany at an early age, and their parents at the age of 35-50 years. who moved to Germany in the 1990s-2010s, and Russian monolinguals of similar age living in Russia. A simple sentence is an elementary grammatical unit with structural, semantic and intonation completeness, and therefore is an important communicative unit of the Russian language. Its structural-semantic organization is complex and is built according to a certain formal pattern that forms its predicative basis. As a syntactic unit, it is necessary to create a monologue statement, as it is a speech-forming and text-forming means of the language. The use of grammatically and structurally correct sentences enriches speech, allows you to more accurately express your thoughts, and argue your point of view. The analysis of simple sentences in the speech of bilinguals and their comparison with sentences in the speech of monolinguals is important both for the theory of bilingualism and for teaching Russian to bilinguals living abroad. The importance of such a study determines the relevance of this article. The purpose of this study is to identify the features of the construction and use of a simple sentence in the stories of Russian-German bilinguals (native speakers of the inherited Russian language) and compare them with similar deviations from the norms in the stories of Russian monolinguals. During the experimental study, the average share of deviations from syntactic norms in the stories of informants was revealed; violations were classified and ranked according to structural types - deviations from the norms of using a simple sentence as a component of a coherent monologue statement and deviations from the norms of constructing a simple sentence. The most typical deviations are established in the work: omission or replacement of a sentence; incorrect use of means of communication between simple sentences (pronouns, adverbs, particles and introductory words); violation of word order; the use of the main members of the proposal and homogeneous members of the proposal; violations of the species-temporal correlation of verb forms, etc. The study revealed the most frequent deviations in the speech of all four groups of informants; it is concluded that some deviations of bilingual children (word order) can be caused by the influence of the German language, the speech of monolinguals is more normalized (the influence of the Russian education system), bilinguals (10-15 years old) try to keep the inherited Russian language at the level of a simple sentence despite the dominance of the German language.