- Check my video for more details! -
https://www.youtube.com/watch?v=4Tk__BIRstw&t=12s

★verb (ta-form) + ことがあります (koto ga arimasu)★
To talk about a past experience, we can use the past form a verb (also known as ta-form) followed by ことがあります (koto ga arimasu).  This is a way to express that you “have done something before”.  
verb (ta-form) + ことがあります (koto ga arimasu)
日本の映画を見たことがあります。
nihon no eiga o mita koto ga arimasu
(I have been watched Japanese movie)
ことがある (koto ga aru) is extremely useful for beginners who are trying to take that first step into Japanese conversation.  After all, talking about your experiences with each other may only be a few steps past hajimemashite (nice to meet you).  You only need a limited vocabulary to play around with this phrase, and it’s a great way to practice conjugating verbs to the past tense.  Asking someone about their own experiences is as simple as adding the question particle か (ka) at the end:
日本の映画を見たことがありますか
nihon no eiga o mita koto ga arimasu ka?
(Have you watched Japanese movie?)

日本行ったことがありますか。
Nihon ni itta koto ga arimasu ka?
(Have you ever been to Japan?)

私は京都に行ったことがあります。
Watashi wa Kyouto ni itta koto ga arimasu.
(I have been to Kyoto before.)

刺身を食べたことがあります。
sashimi wo tabeta koto ga arimasu.
(I have eaten sashimi before)

富士山に登ったことがありません。
fujisan ni nobotta koto ga arimasen.
(I have not climed Mount Fuji before.)

カラオケで歌ったことがないです。
Karaoke de utatta koto ga nai desu.
(I have never sung Karaoke before.)

新幹線に のった こと が ありますか。
shinkansen ni notta koto ga arimasu ka
(Have you ever taken a bullet train?)

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