hadn't 英语 词源 had + -n't 发音 IPA(帮助)：/ˈhæd(ə)nt/ 音频 (美式)动词 hadn't (非正式) had not（否定助动词[1]）的缩约形。参考资料 ↑ Arnold M. Zwicky and Geoffrey K. Pullum, Cliticization vs. Inflection: English n’t, Language 59 (3), 1983, pp. 502-513
