Interaction of dou and scope effects in Mandarin relative clause

How to analyze the multi-functional focus-sensitive operatordouinMandarin has been a long-standing debate (Lin 1998; Giannakidou & Cheng 2006;Xiang 2008; Liao 2011; Liu 2017, 2018; Xiang 2020, a.o.). In this paper, I providenovel arguments for the analysis ofdouin analogy toonlyproposed in Xiang (2020),by examining the interaction ofdouwith scope effects in relative clauses embeddedin different matrix clauses. I propose that the scope effects in RCs embedded innon-specificational sentences are derived from long QR of the embedded QP, whilethose in specificational sentences result from a natural-function analysis of the RC,which does not involve movement of the focus associated withdou. Crucially, thefocus-semantics ofdoublocks the former while is compatible with the latter. Thepuzzles and the proposed solution also adds new perspective into the more generalquestion of focus-association with moved elements.