“好不”是现代汉语中使用频率较高的一个词。本文着重从语法和语用的角度来讨论了表肯定的“好不”和表否定的“好不”之间的差异。前人一般认为在现代汉语中“好不”只能修饰双音节形容词,而通过研究我们发现“好不”也能修饰多音节形容词和动词,而表否定的“好不”大部分是“好+不X”的形式。 “Okay ” is a frequently used word in modern Chinese. This article focuses on the difference between a grammar and a pragmatic point of view of the table affirmative “not good” and the table negative “good”. Former scholars generally think that in modern Chinese, “good” can only modify two-syllable adjectives, and through research we find that “good” can also modify multi-syllable adjectives and verbs, while most of the “negative” Is the “good + not X ” form.