讲究礼貌是言语交际中的普遍现象，在社会交往中，礼貌是维护公共秩序，促进人际关系的一个不可缺少的因素。但是，在实际的言语中，由于会话双方各自所遵循的社会文化规约（socialconvention）或会话策略（conversationalstratng）不同，即使在语言上没有障碍，也可能由于言语 Pay attention to politeness is a common phenomenon in verbal communication. In social interaction, politeness is an indispensable factor in maintaining public order and promoting interpersonal relationships. However, in actual speech, because of the different socialconventions or conversational strategies that each of the two parties in the conversation follow, even if there is no language barrier, it may be due to speech