děi     must / ought to

繁体 traditional:
语法 grammar: 助动词 Auxiliary Verb
笔记 notes: In this sense, 得 is an auxiliary verb expressing obligation. The negative form is 不用 or 不要. It began to be used in this sense from the Tang (ABC 'děi' 得 v 2; NCCED děi '得' 3; Norman 1988, p. 125).
上概念 parent concept: 虚词 (Function Words)
话题 topic: 现代汉语 (Modern Chinese)

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