0方言消亡的类型从语言或方言消亡的过程的角度看,方言的消亡分突变型和渐变型两种(曹志耘2001)。突变型实际上是方言的转换,操弱势方言的人群夹在强势方言人群中间,经由双方言阶段,最后转说强势方言。渐变型是在强势方言的影响和冲击下,弱势方言逐渐磨损,失去自己的特殊成分,同时吸收强势方言的成分,使自己 0 dialects disappear from the dialect of the disappearance of language or dialect process point of view, the demise of dialects sub-mutation and gradual type (Cao Zhiyun 2001). Mutation is actually a dialect conversion, speaking weak dialect crowd caught in the middle of a strong dialect crowd, the dual dialect phase, the final transfer to the strong dialect. Gradient is under the influence and impact of strong dialects, weak dialects gradually wear and lose their own special ingredients, while absorbing the strong dialect components, so that their own