三方俗音中韵母的情况是比较复杂的,可以从韵尾的阴阳入的对转去观察,也可以从韵摄的关系去研究,还可以从介音的开合、等各方面去分析。3.1清代学者提出了汉语语音演变中的阴阳对转现象。其实在汉语语音发展史上,阴阳入三声都有对转现象存在。先看阴阳对转。所谓阴阳对转指的是阴声韵转变为阳声韵,即是增加了鼻音韵尾;或者相反的变化,带鼻音韵尾的字失去了 Tripartite vulgar vowels in the situation is more complex, you can from the end of the yin and yang of the rhyme into the turn to observe, you can also learn from the relationship between rhyme, but also from the opening and closing, and other aspects to analyze. 3.1 Qing scholars raised the phenomenon of Chinese yin and yang in the evolution of speech. In fact, in the history of the development of Chinese speech, the three pronunciations of yin and yang exist in existence. Look at the yin and yang on the turn. The so-called yin and yang refers to the transfer of yin rhyme rhyme into positive rhyme, that is, an increase of nasal rhyme; or the opposite change, with nasal rhyme word lost