cockiness 是不可数名词,没有复数形式,前面可加定冠词 the 或物主代词,如 his cockiness。常见句型:主语 + 系动词 + cockiness,如 His cockiness is annoying. 也可作宾语,如 She disliked his cockiness. 易错点:不要与 cocky(形容词)混淆,如不说 He is cockiness,应说 He is cocky。另外,cockiness 不能直接接宾语,需通过介词短语补充,如 cockiness about sth。注意区分 cockiness 与 cocksureness,后者更强调“绝对确信”,但两者常可互换。