Couldn't

来自Big Physics
Safin（讨论 | 贡献）2022年4月28日 (四) 10:15的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/couldn't ref] could +‎ -n’t == etymonline == [https://www.etymonline.com/word/cou…”的新页面）
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wiktionary

ref 

could +‎  -n’t


etymonline

ref

couldn't

by 1670s, contraction of could + not.

取自“https://www.bigphysics.org/index.php?title=Couldn%27t&oldid=40905”