||Oh, Chisung & Park, Tae-Sook. (2016). Korean learners' causal use of because-, since-, and as-clauses. The Linguistic Association of Korea Journal, 24(4), 303-319. This study investigates Korean learners' positioning of because-, since-, and as-clauses in relation to main clauses in causal complex sentences. For this purpose, 156 low-intermediate college students were asked to write English sentences using causal because, since, and as as class assignments. Because-, since-, and as-clauses in their English compositions were analyzed in terms of ordering of causal adverbial clauses and main clauses. The results showed that because-clauses were used most frequently as independent clauses, and that since-clauses and as-clauses were preposed more often than because-clauses. Particularly, students used independent since- and as-clauses, though they were used less frequently than independent because-clauses. These results suggest that Korean learners tend to recognize not only because but also since and as as waynyahomyen in Korean. The transfer of L1, argued in Park & Oh's (2016) study on because-clauses, is shown to have an effect on the use of ungrammatical independent since- and as-clauses. As for preposed since- and as-clauses, it is indicated that since and as are considered -ki ttaymwuney more often than because. This factor might lead Korean learners to use since- and as-clauses more frequently before the main clause, in comparison with because-clauses.