The purpose of this paper has two aims. The one is to delineate tonal alternations of verb ‘Ka·da’-types in Pyeongchang dialect, and the other is to elucidate the change of tonal alternations, based on the geographical variation in Gangwon dialect. This paper can be summarized as follows. First, Pyeongchang dialect have peculiar pitch patterns, the Yin plain tone pattern which can not be derived by normal pitch realization rules. There are two types; HM-1 type and HM˘ -1 type. The verbs ‘Ka·da, Na·da, Ja·da, O·da, Ji·da’ belong to HM-1 type and The verbs ‘Ju·da, Nu·da, du·da, ha·da’ is a member of HM˘ -1 type. Sound, the verbs ‘Sa·da, Seo·da’ belong to the Yin plain tone pattern and have regular tonal alternations in Pyeongchang dialect. Third, the peculiar pitch pattern can be divided into two types in Gangwon dialect.; the one is to have the geographical variation; The verbs are Ka·da, Na·da, Ja·da, O·da, Ji·da, Ju·da, Nu·da, du·da and ha·da’. and the other is not to have.; the verb is Ji·da. that belong to HM-1 type in Samcheok and Pyeongchang dialect. But is a member of HM-2 type in Gangneong and Jeongseon dialect. Fourth, the verbs ‘Sa·da, Seo·da’ have the geographical variation in Gangwon dialect. In short, the verbs ‘Sa·da, Seo·da’ have regular tonal alternations in Pyeongchang and Gangneong dialect, but have irregular tonal alternations in Samcheok and Jeongseon dialect. Fifth, a tonal alternations of ‘Sa·da, Seo·da’ changed into regular from irregular. because the departing tonal pattern of the tonal system is just so unsteady in Pyeongchang and Gangneong dialect. Also, the Paradigm Shift of ‘Sa·da, Seo·da’ occurred by analogy.