YOU SAID:

go home he went home and came back a year later where was he ? well never know

INTO JAPANESE

家に帰ると、彼は家に帰って1年後にどこに戻ってきましたか。よく知らない

BACK INTO ENGLISH

When he got home, where did he come back a year after he got home? I don't know much about it.

INTO JAPANESE

彼が家に帰ったとき、彼は家に帰ってから1年後にどこに戻ってきましたか。私はそれについてあまり知りません。

BACK INTO ENGLISH

When he got home, where did he come back a year after he got home? I don't know much about it.