安徽当涂县湖阳乡大邢村方言中动词后附“啊”[a~0]的语法功能包括完成体助词、句末语气助词、持续体助词、方位介词、补语标记等五种,本文对其做了详细描写,并从语音、语法两个方面,结合汉语史和其他方言的材料,说明湖阳方言“啊”应来自动词后趋向补语“下”的语法化。此外,文章还从方言接触的角度,具体探讨了湖阳方言在安徽江淮官话的影响下所表现出的几种竞争性演变。 The grammatical functions of dialect “a ~ 0” attached to Daxingcun dialect of Huyang Township, Dangtu County, Anhui Province include five kinds of grammatical functions of Complement Body Modal, Modal Particle, Persistent Body Auxiliary, Position Preposition and Complement Marker , This article describes it in detail, and from the aspects of phonetics and grammar, we combine the materials of Chinese history and other dialects to show that the grammaticalization of Huyang dialect “ah ” should come from the post-verb tense complement "下 . In addition, the article also discusses several competitive evolutions of Huyang dialect under the influence of Anhui Jianghuai Mandarin dialect from the angle of dialect contact.