Abstract
The article presents the stages of the formation of scientific-natural and scientific-technical substyles.The method of linguistics and translation studies were used to study the speech patterns investigated.The scientific journal article is considered as the highest level in the activity of scientific communication.The main focus is made on the speech patterns based on these associations. The language lexical featuresof speech patterns, the communicative strategy of selecting the speech situations from the reality wereshown. The three-level classification was proposed which relies on the main stages in the process of theformation of communicative speech. The importance and novelty of the materials of this research is correlated with the theoretical and problematic issues of translation in English-Russian scientific sphere. Thematerials of this paper and others on the given topic are used in the teaching practice of English for thestudents of natural science specialties of Al-Farabi Kazakh National University.