YOU SAID:

It's the only place that she could've been!

INTO JAPANESE

そこが彼女がいたであろう唯一の場所なのです！

BACK INTO ENGLISH

That's the only place she could have been!

INTO JAPANESE

そこが彼女が居られる唯一の場所だったのだ！

BACK INTO ENGLISH

It was the only place she could be!

INTO JAPANESE

そこが彼女がいられる唯一の場所だったのだ！

BACK INTO ENGLISH

It was the only place she could be!