本研究通过分析英语专业学生表达异议的方式以及英语水平对其的影响， 考察对话中协同原则的使用。研究数据来源于中国学生英语口语语料库48名英语专业二年级学生的对话，笔者对三个不同水,组学生的异议表达方式进行了分类统计。 结果显示对话双方表达异议时， 协同方式多于非协同方式， 从而验证了协同是对话的重要机制。 研究还发现， 口语水平不同的学习者对异议表达方式的选择表现出不同趋势。高水平者的表达方式更具多样性，也更能注意避免冲突发生 。

The present study aims to investigate how English majors in China use the alignment principle while expressing disagreement by analyzing their ways of disagreement and the effects of proficiency on disagreement． The dyadic conversations of 48 subjects were selected as samples for data analysis from SECCL ( Spoken English Corpus of Chinese Learners) ． The ways that the subjects of different proficiency levels used to express disagreement were categorized and tallied． It was found that when the students expressed disagreement ，they chose to use significantly more alignment ways than non-alignment ways ，which confirmed the hypothesis that alignment was an important mechanism of conversation． Moreover ，compared to low achievers ，high achievers showed more variety in expressing disagreement and they were inclined to use more alignment strategies．