In this paper, I explore the complex domain of counterfactuality, arguing for its recognition as a discrete grammatical category. My analysis is based on the premise that counterfactuality, as a linguistic construct, encompasses propositions and scenarios that diverge from the empirical realities of our world. I then examine the use of counterfactual expressions in both subordinate clauses and main clauses, with a particular focus on their prevalence in subordinate clauses. These expressions are carefully categorized into three distinct types according to their semantic nature: conditional construction, concessive construction and contrastive construction. Finally, the functions of counterfactual expressions are delineated, revealing their multifaceted roles in serving emotional, preparatory, and inferential purposes within communication.

Abstract
1. 서론
2. 반사실성의 개념과 표현 특징
    2.1. 반사실성 개념
    2.2. 반사실성 표현의 특징
3. 종속절의 반사실성 표현
    3.1. 반사실적 조건 표현
    3.2. 반사실적 양보 표현
    3.3. 반사실적 대립 표현
4. 반사실성 표현의 기능
5. 결론
참고문헌

• 마군몽(Ph.D. student, Department of Korean Language and Literature, Gyeongsang National University; 501 Jinju Dae-ro, Jinju 52828, South Korea) | Junmeng Ma