YOU SAID:

He was a boy, she was a girl, how can i make it more obvious?

INTO JAPANESE

少年の頃、彼女は女の子だった、どうしたらそれより明らかですか。

BACK INTO ENGLISH

When I was a boy she was a girl, what should I do it is clear?

INTO JAPANESE

少年の頃彼女が女の子だった、何を行う必要がありますは明らかです。

BACK INTO ENGLISH

Should do nothing when I was a boy she was a girl, obviously.

INTO JAPANESE

彼女は明らかに、少女は、少年の頃は、何も行う必要があります。

BACK INTO ENGLISH

She reveals the boy need girl.

INTO JAPANESE

彼女は少年の必要性少女を明らかにします。

BACK INTO ENGLISH

She reveals the boy need girl.