YOU SAID:

my teacher has the same birthday as my dad.

INTO JAPANESE

私の先生は、私の父と同じ誕生日を持っています。

BACK INTO ENGLISH

My teacher, I have the same birthday with my father.

INTO JAPANESE

先生は、私は父と同じ誕生日を持っています。

BACK INTO ENGLISH

Teacher, I have the same birthday as his father.

INTO JAPANESE

先生、私は父親と​​同じ誕生日を持っています。

BACK INTO ENGLISH

Teacher, I have the same birthday as his father.