Abstract
Among Japanese compound verbs, those expressing aspect lack corresponding expressions in Vietnamese as well as many other languages including Chinese, English and Korean. Production of such verbs by learners of Japanese is extremely low. However, this paper distinguishes lack of production of a linguistic form and understanding of that form. Focusing on the compound verb “-dasu”, it analyzes acceptability judgements by Vietnamese learners and Japanese native speakers, observes learners' understanding of compound verbs, and proposes more effective pedagogical methods for their instruction.
