How Much the First Language is There in Teachers’ Talk in EFL Classroom?

Over the past decades, increasing interest in code-switching has triggered numerous empirical studies in the foreign language classroom, which show that the switching to L1 has become an important strategy in foreign language teaching and its implication in bilingual classroom is of great importance. This paper is a preliminary endeavor to probe into the situation of the switching to the L1 in Chinese university classes, with a focus on revealing how much the L1 is used in different lesson contents.