本稿站在日本語教育文法的觀點,針對「wakedewanai」進行分析以及考察。以在「怎麼樣的場合」「怎麼使用」為考察重點,同時也記述「wakedewanai」在不同文章脈絡所呈現的使用機能。透過上述的分析以及考察,本稿將「wakedewanai」的用法分為兩大類,並可再細分為七小項用法。此外,為了方便學習者進行語言產出,根據不同的使用機能分別整理出各自的共現表現。|This paper analyzes and discusses the Japanese explanatory modality "wakedewanai" in terms of context-oriented pedagogical grammar. The analysis considers in when and how "wakedewanai" is used, as well as the function which the phrase is fulfilling in the context of each usage. As a result, it was found "wakedewanai" could be grouped into two large categories, and further divided into seven detailed types. The function of each type and where the phrase is most likely to co-occur was also complied, considering the need for classification for production by second-language learners.