The evolution of tone system in Basuo Junhua(八所军话)of Hainan province
In the new tone system of Basuo Junhua(八所军话),level tone with voiceless consonant,level tone with voiced consonant and departing tone in the old tone system have changed into level tone with voiced consonant,departing tone and level tone with voiceless consonant respectively.The paper suggests that such a change is actually a push chain shift.This circular change offers further evidences which support Hisao Hirayama's theory of"circular tone change".
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