LEARN + JAPANESE / Note 111 JLPT N4

Sometimes, and I've Done It Before (ことがある)

ことがある attaches after a verb, and what it means depends entirely on the tense in front of it. Dictionary form + ことがある describes something that happens occasionally. Past た-form + ことがある describes something you’ve experienced at least once.

In Real Life
This dictionary-form version pairs naturally with 時々 (sometimes) or 大抵〜が、時々〜 (usually X, but sometimes Y), describing a pattern with occasional exceptions, not a one-off event.
In Real Life
The past-tense version names a life experience, ever having done something, regardless of when or how often. あります confirms you’ve done it at least once; ありません says you never have, both completely unrelated to routine or frequency.
In Real Life
い-adjectives and な-adjectives also take ことがある in the past form to describe something that was once true but no longer is, 髪が短かったことがあります, “her hair used to be short,” a useful way to talk about a past state that’s since changed.

Vocabulary

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