Mc Entering In The Comfort Of Dialect Study

This thesis selected 525 middle ancient Chinese Ru tone characters, then investigated their pronunciation types in various dialects,and classifyied them by their coda, tone, and the main vowels. As the evolution of different dialects'phonology is unsynchronous, the classification can reflect the phonology changes in regions, so we can generalize the process of Ru tone'laxation.The classification of different dialects'Ru tone coda in synchronic horizon,can make us conclude that the disappearing process of Ru tone coda is: p,t,k→t,k→k→?→?.That is to say"p"disappeared firstly,"t"coda followed, and"k"retained, at last"k"change into"?".As the Ru tone coda relax forword,"?"coda disappeared either. we also examined the historical materials of rhyme books, which also made evidence.The study on the tone incorporation of relaxed characters in dialects that exist Ru rhymes and without Ru rhymes,we summarized the incorporation situation of relaxed Ru tone,and found that after laxation the Ru tone merged into Qu tone is a common phenomenon.We also summarized the principles of relaxed Ru tone merger:The tone category principle and the pitch similitude principle.By investigating the pronunciations of the relaxed characters'vowels, we summarized the different merger directions of relaxed characters into Yin rhymes in different dialects, we also pointed out the significance of this study. Besides,we found that after ru tone's laxation the main vowels experienced low change and apicalization change.At last we summarized the Ru tone coda's continue change after laxation.