The study of disagreement speech acts is one of the fields which receive the least attention in pragmaties. The power disparity between language teachers and their students is one of the many factors having direct influence on the learning of disagreement speech acts. Based on the weekly task sheet, discourse completion task and role play conducted among 36 Chinese students of English in Sheffield University, this study shows that： Chinese students are good at using disagreement speech acts when communicating with their counterparts; in classroom learning and when communicating with their superiors, Chinese students are reluctant to use disagreement speech acts. Therefore, in the English classroom teaching, teachers should encourage students to use the disagreement speech acts effectively.%异议言语行为研究在语用学中一向是不太受关注的领域。影响异议言语习得的因素很多，师生权位关系差异是其中很重要的因素之一。中国留学生在与自己权位平等的人交流时，很善使用异议言语；与比自己权位高的人交流时，中国学生不善使用异议言语。在课堂学习中，中国学生极少使用异议言语。英语教师在教学中应鼓励学生有效地使用异议言语策略。
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