YOU SAID:
But I could not stop worrying about you.
INTO JAPANESE
しかし、私はあなたを心配することを停止できませんでした。
BACK INTO ENGLISH
But I can't stop worrying about you.
INTO JAPANESE
しかし、私はあなたを心配することを止めることはできません。
BACK INTO ENGLISH
But I can't stop worrying about you.
That didn't even make that much sense in English.