"oughtn\'t." YourDictionary, n.d. Web. 23 June 2018. <http://www.yourdictionary.com/oughtn-t>.
oughtn\'t. (n.d.). Retrieved June 23rd, 2018, from http://www.yourdictionary.com/oughtn-t
Both oughtn't and ought not have become rare in North America. Oughtn't in particular may not be understood.
ought +"Ž -n't
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