Abstract
Realizing the communicative function of language is one of the goals of language learning. Code-switching is a fundamental component of second language acquisition and is present throughout the entire process. This paper mainly summarizes the previous research on code-switching and second language acquisition. It offers real-world examples to illustrate the reasons why teachers and students choose to practice code-switching as well as its benefits and drawbacks in two categories: classroom settings and non-classroom settings. The main conclusion of this paper is that code-switching can help students understand learning content more easily, absorb knowledge more quickly, and acquire a second language more efficiently. However, in order to prevent the disruption produced by code-switching on second language acquisition, both teachers and students should limit the frequency of code-switching. This paper aims to provide some existing materials for the researchers and teachers who study second language acquisition and code-switching, and also to motivate teachers to use code-switching correctly, so as to help students acquire a second language.
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