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GRAMMAR DETAIL

〜ことにしている

N3

make it a rule to ...

Indicates a personal policy that is maintained as a regular habit.

Examples

2

Study notes

1. Origins, structure, and basic meaning

  • Structure: Use ことにしている after a dictionary-form or negative verb to describe maintaining a self-chosen policy in daily practice.
  • Basic usage: 寝る前に、翌日の予定を確認することにしている。 presents checking the next day's schedule before bed as a personal rule.

2. Common pitfalls and similar expressions

  • Making a decision and maintaining it
    • 夜は飲まないことにした reports the decision not to drink at night. 夜は飲まないことにしている focuses on maintaining that policy now.
  • Personal policy and an established rule
    • 名札を付けることにしている can present wearing a name tag as the speaker's policy, while 名札を付けることになっている can present it as an established rule. The choice depends on whose decision the policy is presented as.

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