立彬の日本語

戸はひとりでに開いた。

tbd

The door opened automatically.
The door opened by itself.
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ひとりでに, 独りでに, 一人でに
1. by itself, automatically, naturally
tbd
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戸(と)[01]
1. indicates sentence topic 2. indicates contrast with another option (stated or unstated) 3. adds emphasis
指示句子的主题;表示与另一选项(无论是否明确提及)形成对比;表示强调
详情...
開く(あく)[01]{開いた}