本文在《现代汉语有标记反实条件句预设触发的研究》(黄雪梅,2014)的基础上,运用可能世界理论,对英汉违实条件句预设机制进行对比研究。研究发现,英汉违实条件句预设机制与语义紧密相关,而与语言形态关联甚少。虽然英语的形态较汉语丰富,英语违实条件句中有虚拟语气的存在,但其预设机制与汉语违实条件句基本一致。 Based on the research on the presupposition triggering of marked anti-realism clauses in modern Chinese (Huang Xuemei, 2014), the author uses the possible world theory to make a comparative study on the default mechanism of the conditional clauses in English and Chinese. The study found that the presupposition mechanism of English and Chinese violating conditions is closely related to the semantic meaning, but has little to do with the linguistic forms. Although the morphology of English is more abundant than that of Chinese, there is a subjunctive tone in English violating conditions, but its default mechanism is basically consistent with that of Chinese.