The purpose of this study is to explore the possibility of modal expression education in text writing by analyzing the aspects of learner’s summary text writing. Previous studies that have extensively investigated the relationship between writing education and grammar education in Korean language education confirm that grammar knowledge is considered as morphological syntactic knowledge in both areas. In addition, the content of grammar education for sentence writing emphasizes the need to examine the relationship between the genres of text and sentences and the grammatical elements used in sentences beyond single sentence units. In this study, we analyzed the aspect expression in the learners’ summary writing tasks because it clearly indicates the genre of text among the grammatical elements used in the sentence. As a result, the following shortcomings of learners were determined: (1) lack of awareness of the genre characteristics of the summary, (2) lack of consideration of the learner's own identity as the language agent producing the summary, (3) an inadequate understanding of attitude of the author of the original text. These results emphasize the importance of preparing aspect expression education contents for text writing.