YOU SAID:

My sister is a boy. I am her brother and I go to a school for girls.

INTO JAPANESE

私の妹は少年です。私は彼女の兄弟と女の子のための学校を行き。

BACK INTO ENGLISH

My sister is a boy. I go to school for girls with her brother.

INTO JAPANESE

私の妹は少年です。彼女の兄弟と女の子のための学校に行きます。

BACK INTO ENGLISH

My sister is a boy. I go to school for girls with her brother.