The present study explored usage patterns of English coordinating conjunctions(CCs) in Korean EFL learners' and native English speakers' written corpus. Focusing on the morpho-syntactic use and cohesive functions of and, but, or and so as focal examples in academic prose, both quantitative and qualitative analyses were employed. Findings from the quantitative analysis of the opinion essays showed that both groups used and most frequently, which is used mostly in word/phrase levels rather than in clause levels. On the other hand, so is especially used as a clause-level CC. Because or and and used most frequently in word/phrase levels are recognized easily as CCs, they rarely appear in a sentence-initial position. By contrast, so and but used more often in a clause level appear in a sentence-initial position more frequently, which may lead L2 learners to confuse CCs with connective adverbials(CAs). Based on the Subset Principle, it may be interpreted that morpho-syntactic properties on CAs in Korean transfer to those on English CCs due to the morpho-lexical difference of CCs between the two languages. However, this study reveals that the L1 transfer seems to gradually retreat at an intermediate level where L2 learners start to perceive the registers of academic prose.

Abstract
 1. 서론
 2. 이론적 배경
  2.1. 등위접속사와 접속부사의 어휘-통사적 특성
  2.2. 등위접속사와 접속부사의 텍스트적 기능
  2.3. 부분집합의 원리(The Subset Principle)
 3. 연구방법
  3.1. 연구 자료
  3.2. 자료 분석 방법 및 절차
 4. 연구 결과 및 논의
 5. 결론 및 제언
 참고문헌

• 표시연(숙명여자대학교)