Tense, Aspect and the Cognitive Representation of Time Kenneth Man-kam Yip author 1985-07 text 23rd Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Chicago, Illinois, USA conference publication yip-1985-tense 10.3115/981210.981213 https://aclanthology.org/P85-1003/ 1985-07 18 26