本研究是以和推量用法有相關的各種樣相形式做為分析對象。而這些樣相形式的用法可依照上下文的相關概念做分類外，這些用法的區分方式其重要的關鍵在於話者所具有的知識。具體而言，文章中具有推量的樣相形式時可分為 (1) 獨白文，對話文都可以使用的用法 (2)只能用在對話文的用法。用法 (1) 又可因與話者的知識狀態關聯區分為推量，矛盾，同意三種。且這三種分類與一般人獲得新知識時知識的擴張，知識的修正等知識管理的具體側面有對應關係。以下為本研究的成果，(1) 到目前為止這些用法在理論上定位不明確的概念，可以用語用論裡的概念做新的定位，(2) 可以更具體的說明樣相形式的意思與用法的關係。

In this paper, it has been elucidated that the various kinds of uses of Japanese inferential expressions can be classified by the concepts which have the intimate relation to the context, and that the state of knowledge is one of the key concepts of this classification. More specifically, it is clarified that the uses of inferential expressions can be divided into (i) the ones which appear both in the monologue and in the dialogue, and (ii) the ones appear only in the dialogue. Also, it is argued that the uses (i) can be categorized into three groups: the inference, the contradiction, and the resolution of the contradiction, each of which corresponds to such procedures for updating human knowledge as expansion and adjustment. This paper indicates the possibility that the various uses of the Japanese inferential expressions, the theoretical status of which has not been clear in the former studies, can be dealt with as the pragmatic concepts, and also suggests that the relationship between modal expressions and their uses may be described systematically.