Based on the divergence and convergence of the Ri initials and the Ni and Lai initials in modern Chinese dialects,this paper studies the explanations for the varied pronunciations involved,assuming that sound change happened in different historical stages and led to the evolution.%以汉语方言中日母与泥、来二母分合关系为观察点,对现代汉语方言中日母复杂多样的今读形式作出解释,认为日母在南北方言中不同的表现其实是不同的历史时期出现相同性质的音变,进而对日母的发展演变路径作出了拟测。
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