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Since English became a compulsory subject for Chinese college students in 1986,English learning and speaking has been popular in Chinese universities.Under this background,Chinese college students tend to code-switch between Chinese and English,which means to mix English when they speak Chinese.In the past decades,many researchers have studied code-switching(CS)from different perspectives.This paper studies what researchers have said about CS in the previous studies.
Since English became a compulsory subject for Chinese college students in 1986, English learning and speaking has been popular in Chinese universities .Under this background, Chinese college students tend to code-switch between Chinese and English, which means to mix English when they speak Chinese .In the past decades, many researchers have studied code-switching (CS) from different perspectives.This paper studies what researchers have said about CS in the previous studies.