YOU SAID:
who he was ten his father
INTO JAPANESE
彼は父親だったのは誰?
BACK INTO ENGLISH
Who was he father?
INTO JAPANESE
彼は父親は誰ですか?
BACK INTO ENGLISH
Who is his father?
INTO JAPANESE
彼の父親は誰ですか?
BACK INTO ENGLISH
Who is his father?
You've done this before, haven't you.