Explanation
Used to express that something happens sometimes or has happened before.
Formation
Verb-dictionary form + ことがある
Detailed explanation
The grammar point る ことがある is used to express that something occurs sometimes or has occurred in the past. It indicates that the action is not a regular or constant event, but rather something that takes place occasionally or has happened at least once.
Examples
彼は遅刻することがあります。
Kare wa chikoku suru koto ga arimasu.
He is sometimes late.
私は寝坊することがあります。
Watashi wa nebou suru koto ga arimasu.
I sometimes oversleep.
彼女は歌を歌うことがあります。
Kanojo wa uta o utau koto ga arimasu.
She sometimes sings songs.
子供の頃、よく山に登ることがありました。
Kodomo no koro, yoku yama ni noboru koto ga arimashita.
When I was a child, I sometimes climbed mountains.
Practice
Grammar content sourced from hanabira.org.