The L1 Acquisition of the Imperfective Aspect markers in Korean: a Comparison with Japanese Ju-Yeon Ryu author 2011-12 text Proceedings of the 25th Pacific Asia Conference on Language, Information and Computation Helena Hong Gao editor Minghui Dong editor Institute of Digital Enhancement of Cognitive Processing, Waseda University Singapore conference publication ryu-2011-l1 https://aclanthology.org/Y11-1020/ 2011-12 186 195