The purpose of this research is to demonstrate the acquisition process of the ellipsis at the end of sentences for Koreans who learn Japanese through the contrast of Chinese and English native speakers. The sample of analysis comes from OPI data. The two results below are described in detail: First, Koreans who learn Japanese use more frequently the ellipsis at the end of sentences under the “Existing-Verb-Clauses” than Chinese and English native speakers. However, the acquisition level goes up, the frequency of usage is getting higher to the point where the acquisition process is inclined to be equal at both side (Koreans who learn Japanese vs Chinese and English native speaker). Second, the formality varies more than Chinese and English native speakers, as well as it appears at the beginning level. The formality includes “「けど」,「から」,「て」,「ので」”.The formality of Chinese and English native speakers is similar to Koreans who learn Japanese at the end of the learning stage.

This research examines the use of the ellipsis in 30 telephone conversations and shows the reason for the use of the ellipsis in aspects of functionality in the area of study of Korean and Japanese. It also demonstrates if the supplementary of utterance has which type of format at each functionality and if there are the format of the supplementary of utterance repeated. The results below are described in detail 1. The functionality of the ellipsis at the end of sentence in both languages (1) Demanding Behavior: request, recommendation, proposition, (2) Demanding Information: question, confirmation request, (3) Providing Information: self-information, the third person, reason, conveying a story to the others, and (4) Expressing will: revision/ evaluation, self-behavior in future, compliance/support, apology, greeting. 2. The format of the supplementary of utterance of the ellipsis at the end of sentence in both languages. In regard of the format of the supplementary of utterance, Korean has the connection formats, which are「－고」「－ㄴ데」「－니까」and so on, Japanese has「－けど」「－から」「て」「って」and the like. The study shows that formats repeated are existed in the ellipsis at the end of the sentences in both languages.