Yuko Otsuka   
SYNTAX-A JOURNAL OF THEORETICAL EXPERIMENTAL AND INTERDISCIPLINARY RESEARCH 14(3) 265-296 2011年9月 [査読有り]
This paper examines the null arguments occurring in adverbial 'o-clauses in Tongan, whose characteristics are distinct from other kinds of empty categories attested in the language. I argue (a) that the empty category in question should be un...