Japanese grammar
What does ～ことがある (occasionally) mean? Japanese grammar N4
～ことがある (occasionally) means sometimes ~, occasionally ~.
| Level (estimated, JLPT framework) | N4 |
|---|---|
| Structure | V dictionary form + ことがある V ない + ことがある (occasionally not ~) |
| Romaji | ~ koto ga aru |
| Meaning | sometimes ~, occasionally ~ |
Forming it
| Polite | ～ことがあります |
|---|---|
| Negative | 行かない → 行かないことがある |
| Affirmative | 遅れる → 遅れることがある |
How to use it
Talking about something that happens occasionally, not regularly.
- This pattern talks about FREQUENCY: something happens occasionally, not always. It looks at a present habit, not the past.
- A CRITICAL DISTINCTION from ～たことがある (N4-092): they differ in only one spot — the DICTIONARY form vs. the TA form — but the meaning is completely different. 電車が遅れることがあります = "the train is sometimes late" (about the present, frequency). 電車が遅れたことがあります = "I have experienced the train being late before" (about past experience). This is one of the most frequently confused pairs in N4.
- Because it's about frequency, this pattern very often pairs with adverbs: 時々, たまに, 月に一回ぐらい. With an adverb, the sentence's meaning is much clearer.
- The negative form ～ないことがある can also be used: 忙しい時は、昼ごはんを食べないことがあります (when I'm busy, there are times I don't eat lunch).
Examples
朝は道が込むので、電車が遅れることがあります。
The roads are crowded in the morning, so the train is sometimes late.
忙しい時は、昼ごはんを食べないことがあります。
When I am busy, there are times I do not eat lunch.
たまに友達と映画を見に行くことがあります。
Once in a while I go to see a movie with friends.
Keep in mind
- The subject can be anyone/anything, not necessarily yourself — unlike ～たことがある, which usually talks about a specific person's experience.
- Not used for something that happens regularly. If it's the same every day, state it directly with いつも遅れます.
Common mistakes
-
Wrong私は毎日、日本語を話すことがあります。
I speak Japanese every day.
Correct私は毎日、日本語を話します。
～ことがある means "occasionally". A daily activity should be stated directly; using this pattern contradicts 毎日.
-
Wrong私は2015年に日本へ行くことがあります。
I went to Japan back in 2015.
Correct私は2015年に日本へ行ったことがあります。
There's a specific point in the past (2015年), but ことがある is conjugated in the dictionary form (meaning "occasionally, an ongoing habit") — the two meanings clash: an event FIXED to a specific year cannot be something that "occasionally still happens". A past experience at a defined point in time must use ～たことがある.
Exam tips
- Look at the verb form before こと: DICTIONARY form → present frequency; TA form → past experience. One change of form flips the whole meaning.