礼貌原则是人们在交际活动中应当遵守的语用原则。不同文化背景下,外语学习者很容易产生“社交语用失误”,由于教师话语不仅是教师执行教学计划的工具,同时还是学生语言输入的一个重要来源,它在组织课堂教学和学习者的语言习得过程中起着至关重要的作用,因此教师应遵循礼貌策略和礼貌原则,将教师用语艺术化,有助于调动学生积极性,进而推动课堂教学。 Politeness principle is the pragmatic principle that people should abide by in communication activities. Under different cultural backgrounds, foreign language learners are prone to “social pragmatic failures.” Because teacher discourse is not only a tool for teachers to implement instructional programs, but also an important source of student input, it organizes classroom teaching and learners’ language. The process of acquisition plays a crucial role. Therefore, teachers should follow the politeness strategy and politeness principle, artistically teacher language, help mobilize the enthusiasm of students, and then promote classroom teaching.