Abstract
The present research paper discusses the issues of identifying common lexical and semantic mistakes in Kazakh pre-intermediate EFL learners studying in homogeneous groups at university. Words are viewed as powerful tools and when used correctly, words may evoke different feelings and emotions and cause various actions. It’s important to learn how to spot difficult words, correct them timely, and master lexical competence teaching to use the words correctly. The data of the study were collected by learner’s EFL teacher from their final essays. Thirty-one essays were used as the instrument of the study to obtain real language from the participants. The authors of the study hope that the results of the conducted research would contribute to the understanding of the phenomenon of lexical and semantic errors in English language teaching which will help teachers to elaborate the differentiated tasks and ways of explaining new vocabulary preventing students’ misunderstanding. Furthermore, the results of the presented research can serve as guidance and be used in compiling EFL textbooks for Kazakhstani students. As a result, researchers managed to classify lexical and semantic errors in English language teaching, identified frequent errors, and described their causes. The findings of the research illustrate that the participants of the study make errors of word choice and incorrect collocations the most. Moreover, incorrect usage of the preposition and literal translation from L1 are included in the frequent mistakes