Grammar Review: ～ことがある
Structure: [Verb (short, past)] + ことがある
Meaning: I have done [something] before
Usage: This structure is used for past life experience, not for recent or one-time events.
Example:
[日本|にほん] の [温泉|おんせん] に [入|はい]った {ことがあり}ます。
I’ve been in a Japanese hot spring before.
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