~ことがある (experience)

Japanese Grammar Basic Japanese ★★★★★ 5/5 neutral ことがあるkoto ga aru
Reading ことがある
Romaji koto ga aru
Formation Verb た-form + ことがある

Meaning

Used with the past tense of a verb to express that someone has had the experience of doing something at least once. It is equivalent to 'have done' or 'have experienced' in English.

Verb た-form + ことがある expresses life experience — whether someone has ever done something. The negative ことがない means 'have never done.' This pattern emphasizes whether the experience exists in one's life history, not when it happened or how many times. It is commonly used for travel, food, activities, and unique experiences. Note that this is different from Verb dictionary form + ことがある, which means 'sometimes' or 'there are times when.' The particle が can sometimes be replaced by は for contrastive emphasis, as in 食べたことはある meaning 'I have eaten it, at least.'

Examples

  1. 北海道に行ったことがある。 I have been to Hokkaido.
  2. 納豆を食べたことがない。 I have never eaten natto.
  3. この映画を見たことがありますか。 Have you ever seen this movie?

Usage Guide

Context: spoken, written, everyday

Tone: descriptive

Do Say

  • 富士山に登ったことがあります。
  • ドイツ語を勉強したことがある。
  • そんな話を聞いたことがない。

Don't Say

  • 北海道に行くことがある。(Using dictionary form changes the meaning to 'sometimes go' — use 行った for past experience) → 北海道に行ったことがある。
  • 昨日寿司を食べたことがある。(ことがある is for general life experience, not events with a specific time — just say 昨日寿司を食べた) → 昨日寿司を食べた。

Origin & History

This construction combines the nominalizer こと with the existential verb ある. The past tense verb before こと frames the action as a completed event, and ある confirms its existence in one's experience.

Cultural Context

Generation: All ages

Social background: Universal

Related Phrases

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