Mandarin Chinese often expresses motion events with more than one verbal motion morpheme, e.g., 退 tui ‘recede’ and 回 hui ‘return’ in 退回房間裏 tui-hui fangjian-li recede-return room-inside ‘return into the room’. Building on recent work on “scale structure”, this paper proposes a “Motion Morpheme Hierarchy” that can be used to better predict the order of co-occurring motion morphemes: specifically,...