The development of the Turkic languages’ syntactic features have always been the research objective of diachronic studies. Sentence types used in scientific works in the middle ages are the research objectives of this article. Generally, the process of compositing the sentence structure in Turkic languages has always been the subject of discussion and argumentation. And this is a matter due to the confrontation the internal development tendencies of the language with the foreign elements, historically, in the process of polishing a composite sentence, as well as the change of the development tendencies by changing the approach to the process within a certain period of time.Lexical elements, intonation, pause, word order, word repetition play a main role in making up composite sentences without conjunctions. Composite sentences without conjunctions and their subsequent development rate, the formation of composite and compound sentences took place parallelly in Turkic languages. The types of compound and complex sentences formed as a result of the development of a simple sentence in two directions within itself are different evolutionary manifestations of the same structure. Expanding on the basis of verbal constructions with a compound sentence which formed as a result of the expansion of a simple sentence with homogenous parts, forming from the simple sentence, the complex sentences are different ways of expressing a complex idea in speech.However, both types of sentences are distinguished by the fact that the possibilities of expressing reality of simple sentence expanding according to the point, and expressing comprehensively.Keywords: sentence, Turkic languages, scientific style, structure of sentence, simple sentence, compound sentence.