由否定词“不”和“没有(无)”构成的双否定结构句式为假设条件句,表示在前述否定性假设条件下推断出否定性结果。该句式多表示可能假设意义,其次是反事实假设意义。受“不”和“没有”分别用于非现实性否定和现实性否定的特点制约,“不……(就)不……”句式基本上只表示可能假设意义,而“没有……(就)没有……”句式相对较多表示反事实假设意义。研究结果表明,双否定结构句式是汉语表示假设可能性情态意义的一种语言形式,具有篇章和修辞功能,能增强论证的力量,能取得更好的修辞效果。 The double negation structure sentence formed by the negatives “no ” and “no ” is the hypothetical conditional sentence, which indicates that the negative result is deduced under the aforementioned negative assumptions. The sentence style more likely to assume the meaning, followed by counterfactual hypothetical meaning. By “not ” and “not ” are respectively used for the restriction of non-realistic negation and negation of realism, “no ... no ...” The sentence basically means only that it is possible to assume the meaning, And “no ... (no) (no) ... ...” a relatively large number of patterns that counter-factual hypothetical meaning. The results show that the double negative structure sentence is a linguistic form with the modality meaning of the hypothetical possibility of Chinese, with the function of texts and rhetoric, which can enhance the power of argument and achieve better rhetorical effect.