unfaithfulness to sb
表示对某人不忠
His unfaithfulness to her was devastating.
他对她的不忠实是毁灭性的。
不忠；不忠实
不忠实；不信守婚誓
不忠；不忠实。
The characteristic of being unfaithful.
Her unfaithfulness was the reason their marriage ended.
她的不忠是他们婚姻结束的原因。
用法提示：名词作主语，表示不忠这一特质。
He could not forgive his partner's unfaithfulness even after many apologies.
即使对方多次道歉，他仍无法原谅伴侣的不忠。
用法提示：名词作宾语，指伴侣的不忠行为。
The novel explores the emotional damage caused by unfaithfulness.
这部小说探讨了不忠造成的情感伤害。
用法提示：名词作介词宾语，表示抽象概念。
表示对某人不忠
His unfaithfulness to her was devastating.
他对她的不忠实是毁灭性的。
Unfaithfulness in a relationship often leads to breakup.
在关系中不忠常导致分手。
所有格结构
She could not forgive his unfaithfulness.
她无法原谅他的不忠。
grammar · medium
易错句子His unfaithful caused the breakup.
正确表达His unfaithfulness caused the breakup.
中文‘不忠实’既可作形容词也可作名词，但英语中‘unfaithful’是形容词，‘unfaithfulness’才是名词。此处需要主语用名词形式，故应改为‘unfaithfulness’。
grammar · medium
易错句子He showed an unfaithfulness to his wife.
正确表达He showed unfaithfulness to his wife.
‘unfaithfulness’是不可数名词，不能与不定冠词‘a/an’连用。去掉冠词即可。
grammar · medium
易错句子His unfaithfulness with his wife was hurtful.
正确表达His unfaithfulness to his wife was hurtful.
‘unfaithfulness’表示对某人不忠时，介词用‘to’而非‘with’。改为‘to’符合英语搭配习惯。
infidelity 通常特指婚姻关系中的不忠行为，而 unfaithfulness 可用于任何承诺或关系的背叛。
faithlessness 强调缺乏信仰或忠诚，语气更抽象；unfaithfulness 多用于具体的人际关系或婚约。
adultery 特指已婚者与他人发生性关系，是 unfaithfulness 的一种具体表现形式，而 unfaithfulness 还可涵盖情感上的不忠。
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