YOU SAID:

You never know what's going to happen until tomorrow

INTO JAPANESE

あなたは明日まで何が起こるかわからない

BACK INTO ENGLISH

You don't know what will happen until tomorrow

INTO JAPANESE

明日まで何が起こるかわからない

BACK INTO ENGLISH

I don't know what will happen until tomorrow

INTO JAPANESE

明日までどうなるかわからない

BACK INTO ENGLISH

I don't know what will happen until tomorrow