由单音词向复音词演变是古代汉语发展为现代汉语的一种重要现象。汉字“然”在古代作为一个单音词具有独立的意义,而到了现代汉语,则更多是作为复音词的一个语素而存在本文对现代汉语用作词缀或构词语素的“然”进行分析,对比其在古代和现代汉语中不同的词义和用法,总结其流变规律,探究它在现代新语言环境中的语言特征和语法功能。 The evolution from monosyllabic to polyphonic is an important phenomenon of the development of ancient Chinese into modern Chinese. The Chinese character “Ran” has an independent meaning in ancient times as a single monophonic word, and in modern Chinese it is more likely to exist as a morpheme of the polysyllabic word. In this paper, we use modern Chinese as affix or morpheme ", Compares its different meanings and usages in ancient and modern Chinese, summarizes its rheological rules, and explores its linguistic and grammatical functions in modern new linguistic environment.