This paper aims to investigate how Korean EFL learners perceive and distinguish between individual-level (I-level) and stage-level (S-level) predicates in existential there-constructions (ETCs). Assuming that they might not be aware of how the predicate type influences the grammaticality of ETCs, it is predicted that Korean EFL learners will exhibit different distributional patterns in their grammaticality judgments of ETCs compared to English native speakers. The experimental results supported this prediction: Korean EFL learners demonstrated less distinct patterns between the predicate types in ETCs while English native speakers clearly distinguished them. Interestingly, however, although their performances were not as pronounced as English native speakers, particularly in lower proficiency levels, Korean EFL learners showed an understanding of the semantic distinction between these predicate types in other contexts. This observation indicates that their linguistic knowledge of these predicate types is not applicable in ETCs.