Yoona is the adnominal form of the auxiliary verb yooda, but its indicative meaning is not always the same as that of yooda. Yoona has its own meanings and functions. According to the difference of the "Reality" of the content shown before yoona, yoona can be thought of in three different ways : yoona as "yootai" (manner), yoona as "hiyu" (simile) and yoona as "naiyoo no nazuke" (naming of content). This paper explores the meanings and functions of yoona in each of the above groups in the pattern of V yoona N. It is clear that yoona has two main functions, one is to show the existence of the speaker\u27s recognition and the other is to show the expanded meaning of the matter indicated without yoona
