“on hearing that” 用法详解
什么是 “on hearing that”？
“on hearing that” 是一个英语中的时间状语结构，表示“一听到……就……”。它属于“介词 on + 动名词”结构，常用于书面语或正式表达中，相当于 “as soon as I heard that...”。
基本结构
其常见结构为：
on + hearing that + 从句on + [someone] + hearing that + 从句（较少见）
注意：hearing 是动名词，不是现在分词；整个短语在句中作时间状语。
经典例句
On hearing that the concert was canceled, she burst into tears.
He left immediately on hearing that his friend was in trouble.
On hearing that the exam had been postponed, the students cheered.
语法要点
- 正式性：该结构多用于书面语，口语中更常用 “as soon as I heard that...”。
- 主语一致性：主句主语通常就是“听到消息”的人。若主语不同，需谨慎使用，避免歧义。
- 不可加主语：不能说 “on he hearing that...”，正确形式应为 “on hearing that...” 或改用从句。
常见错误
❌ 错误：On he hearing that the train was late, he called a taxi.
✅ 正确：On hearing that the train was late, he called a taxi.
✅ 或：As soon as he heard that the train was late, he called a taxi.
同义表达
- As soon as I heard that...
- Immediately after hearing that...
- The moment I heard that...
这些表达更口语化，适合日常交流。