This paper offers a unified account of the semantics of dou(都):according to the Rightward Government Rule,dou is aimed at the event instead of the object;in ad-dition,the events represented by the right predicate are reconceptualized as a series of plu-ral events.From the perspective of Cognitive Grammar,the semantics of dou contains a general image schema which contains three elements:thing,relationship,and scope.The semantics of dou1 is implemented by profiling one of the three elements.The semantics of dou2 and dou3 is the scheme for the special form of expression of end-point profiling,but in different ways:dou2 uses the trajector-landmark alignment mode,and dou3 the refer-ence point-target mode.The semantics of dou as accounted above is a process of schema extraction,and the proposal made in this article is a return to the typological value of Chi-nese as a topic-comment language.