YOU SAID:

i had an a fair with someone

INTO JAPANESE

私は誰かとフェアを持っていた

BACK INTO ENGLISH

I had a fair with someone

INTO JAPANESE

私は誰かとフェアをしました

BACK INTO ENGLISH

I've had a fair with someone

INTO JAPANESE

私は誰かとフェアをしました

BACK INTO ENGLISH

I've had a fair with someone