The Analysis About The Change Of Guangyun's Unvoiced Consonant Entering Tone In The Northern Dialect Of The Yuan Dynasty

In the course of development of Chinese language from ancient to modern Chinese,the disappearance of words of entering tones and reclassification of entering tones in the northern dialect have always been a focus of discussion in phonology.The evolvement of entering tones with full voiced consonants or sub-voiced consonants have its regularity.According to the rules,only the entering tones with voiceless consonants seems to appear in the various tones.This thesis,starting from the first stage of the evolution of entering tones with voiceless consonants since Guang Yun,which are the speech sounds of Yuan Dynasty,describes the situation in which the entering tones with voiceless consonants being included into other tones.The research objects selected are two,Mongolian Phonology and Zhongyuan Phonology.One reasons is that the Phagspa in Mongolian Phonetics demonstrates phonological rules of Chinese clearer and the Zhongyuan Phonology is the highest achievement in the study of Yuan Qu in the Yuan Dynasty.Moreover,compared with Guangyun,the arrangement of the chapters and ways of narration in the two books can better reflect the phonological features of Chinese in the Yuan Dynasty.Many scholars think that Some voiceless entering tones being included into rising tones is an important feature of the Yuan Dynasty's voice,through the study of the Zhongyuan Phonology.However,aside from some non-phonological changes such as variant pronunciation,a considerable part of them in the Yuan Dynasty have been included into other tone groups.The main reason is that the conflation of voiceless and voiced consonant makes some voiceless entering tones change with voiced ones.