The Acquisition of Imperfective Aspect Marking in Korean as a Second Language by Japanese Learners Ju-yeon Ryu author Kaoru Horie author Yasuhiro Shirai author 2010-11 text Proceedings of the 24th Pacific Asia Conference on Language, Information and Computation Ryo Otoguro editor Kiyoshi Ishikawa editor Hiroshi Umemoto editor Kei Yoshimoto editor Yasunari Harada editor Institute of Digital Enhancement of Cognitive Processing, Waseda University Tohoku University, Sendai, Japan conference publication ryu-etal-2010-acquisition https://aclanthology.org/Y10-1078/ 2010-11 677 684