指示代词“某”与叠式“某某”、“某某某”都有称代和指别的意义,在泛代、实代和泛指、实指上有同有异;“某”与叠式在做修饰语时,体现的句法差异很大,且能否单用和能否与“姓氏”连用以及表现形式存在异同。通过对三者的用法进行全面分析,促进“某”与其叠式的理论研究和交际应用。 Demonstrative pronouns “a ” and the overlay “a certain ”, “a certain one ” has a meaning of generation and means other meaning, in the pan-generation, real and general refers to the real Different; “a ” and stacked in the modifier, the embodiment of the syntax is very different, and can only use and whether with “surname ” and the use of forms of expression there are similarities and differences. Through a comprehensive analysis of the usage of the three, promote the “a ” and its stacked theoretical research and communicative application.