had not 的缩写

had not 的标准缩写形式是 hadn't。

这是英语中常见的助动词 had 与否定词 not 的缩略组合，广泛用于过去完成时（Past Perfect Tense）的否定句中。

基本结构

完整形式：
subject + had + not + past participle

缩写形式：
subject + hadn't + past participle

例句对比

使用场景

hadn't 主要用于表达在过去某一时间点之前尚未完成的动作或状态，常见于：

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