YOU SAID:
i never knew you go to the gym!
INTO JAPANESE
私はあなたがジムに行くのを知らなかった!
BACK INTO ENGLISH
I did not know you go to the gym!
INTO JAPANESE
私はあなたがジムに行くのを知らなかった!
BACK INTO ENGLISH
I did not know you go to the gym!
You should move to Japan!