非事实性、反事实预设是由学者George Yule提出的“潜在预设”中的两种预设类型。非事实性、反事实预设中既包含了句子词汇,句法,语法层面的语义预设,还有基于上下文语境的语用预设,它们是CET-4听力理解中阻碍学习者正确判断的难点。教师在授课中将两种预设类型贯穿到CET-4听力理解的练习中,有利于提高学生对听力材料的推理预测能力,从而提高听解和做题的效率。 Non-factual and counterfactual presuppositions are two presumed types in “Potential Presets” proposed by scholar George Yule. Non-factual and counterfactual preconditions contain not only semantic presuppositions of sentence lexicon, syntactic and grammatical levels, but also pragmatic preconditions based on contextual contexts, which prevent learners from judging correctly in CET-4 listening comprehension difficulty. Teachers in the teaching of the two pre-set types through to CET-4 listening comprehension exercises, help improve students’ ability to predict the ability of listening material, thereby enhancing the listening solution and the efficiency of the question.