YOU SAID:
One day I know that you will be there.
INTO JAPANESE
いつかあなたがそこにいることを私は知っています。
BACK INTO ENGLISH
I know you will be there someday.
INTO JAPANESE
私はあなたがいつかそこにいることを知っています。
BACK INTO ENGLISH
I know you will be there someday.
That didn't even make that much sense in English.