疑问语气副词“究竟”向名词“究竟”的去语法化
张秀松
The Degrammaticalization of jiujing from an Interrogative Mood Adverb to a Noun
Zhang Xiusong
语言科学 . 2014, (4): 379 -395 .  DOI: 10.7509/j.linsci.201403.028793