The work is distinguished by its novelty because the syntax of dialects of the Lithuanian language has been hardly explored so far. The goal of this work was to make a thorough description of complex sentences of the East Upper Lithuanians, Vilnius people Dieveniškės and Lazūnai subdialects. While achieving the purpose, the following tasks had to be solved: to explore the typology of complex sentences; to describe the means of subordination; to make an analysis of the structure peculiarity of complex sentences. The resources used in this work are a book written D.Mikulėnienė and K.Morkūnas “Texts of Dieveniškės subdialects”, published in 1997, “Litauische mundartliche Texte aus der Wilnaer Gegend mit grammatischen Anmerkungen” by Peter Aruma, published in Dorpat in 1930. The latter contains texts of Dieveniškės and Lazūnai subdialects. The third resource that was used is “The vocabulary of Lazūnai dialect” by J.Petrauskas and A.Vidugiris, published in 1985. The material was collected from all the available resources and it comprises 2276 complex sentences. Having carried out the research, it appeared that complex sentence components of the subdialects are joined by conjunctions, relative adverbs, relative pronouns, particle ar and responsive words. Complex sentences might have one or several subordinate components. The sentences having one subordinate component might be of functional (explanatory, modifying, suppositional) and of semantic (time, reason, condition... [to full text]