Code-switching is a common phenomenon in daily life. With the improvement of social education level, we have not only mastered our mother tongue, but also other languages. Code-switching between native language, Chinese and English is an ubiquitous phenomenon in daily conversation for ethnic minorities. Previous studies merely focus on code-switching between two languages, but lack the analysis of code switching function in the dialogue between three language users. Code-switching among the three languages involves little communication in daily life. Bilingual education policy and multi-ethnic communication enrich the language of the nation.This paper analyzes the function of human transcribing in the daily conversation of language users.The author made a questionnaire, which designed whether code-switching would be involved in communication, under what circumstances would code-switching occur, and the intention of code-switching. The author collects and records the conversion of people's three languages in the natural state. Secondly, the author classifies and analyzes the recorded dialogues according to their functions.
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