the uselessness of [noun phrase]
常用结构，表示某事物的无用性。
He realized the uselessness of his efforts.
他意识到自己努力的无用。
无用；无益；无效
无用；无价值
无用；无价值
The state or quality of being useless.
She complained about the uselessness of the old printer.
她抱怨那台旧打印机毫无用处。
用法提示：uselessness 是名词，表示“无用”的状态，在句中作介词 about 的宾语。
The uselessness of the argument became clear to everyone.
这场争论的毫无意义对每个人来说都变得很明显。
用法提示：uselessness 是名词，指“无益、无意义”的特性，在句中作主语。
He finally admitted the uselessness of trying to change her mind.
他最终承认试图改变她的想法是徒劳的。
用法提示：uselessness 是名词，表示“徒劳、无效”，后接 of 加动名词结构。
常用结构，表示某事物的无用性。
He realized the uselessness of his efforts.
他意识到自己努力的无用。
表示一种无用之感。
She struggled with a deep sense of uselessness.
她与深深的无用感作斗争。
用于强调突然意识到某物的无用。
They were struck by the uselessness of the old machine.
他们被那台旧机器的无用所震撼。
grammar · medium
易错句子The useless of the method is clear.
正确表达The uselessness of the method is clear.
学习者混淆了形容词和名词，此处主语位置需要使用名词uselessness，而不是形容词useless。
grammar · medium
易错句子He felt a uselessness after losing his job.
正确表达He felt uselessness after losing his job.
uselessness是不可数名词，不能与不定冠词a连用。
uselessness 是名词，意为“无用”；useless 是形容词，意为“无用的”，作定语或表语
uselessness 意为“无用”；usefulness 是反义词，意为“有用”，形式相似但意义相反
use + less
use + ful
use + ful + ness
use + able
use + er
mis + use
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