たことがある (ta koto ga aru)
Meaning: have done something before ; Used to; Have been
How to use the: Verb-plain past + ことがある
Explain:
Refers to an action that has occurred in the past
Example sentences:
1, その本あら子供の頃読んだことがあります。
Sono hon Ara kodomo no koro yonda koto ga arimasu.
I have read that book when I was a kid.
2, やはしさんにはこれまでに2度お会いしたことがあります。
Ya hashi-san ni wa kore made ni 2-do o ai shita koto ga arimasu.
Up to now, I’ve met Yahashi twice.
3. あなたはその階段を使ったことがあるの?
anata wa sono kaidan o tsukatta koto ga aru no.
Have you ever used one of these stairways?
4, 私は東京に行ったことがあります。
Watashi wa Tōkyō ni itta koto ga arimasu.
I have been to Tokyo.
Attention:
Where want to express the question with intent
“Have you been ~ ever?” then we add the auxiliary [か] after the sentence pattern
日本へ行ったことがありますか?
Nihon e itta koto ga arimasu ka?
Have you ever been to Japan?