You will be back someday.
someday adv. 将来，有朝一日
some day 某一天
one day 有一天，某一天
我觉得someday比较符合咯~楼主自己斟酌斟酌哈~
Some day for sure, you will be back.
One day, you will come back .
You will be back,sooner or later.
You will come back one day!
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