YOU SAID:

I were talking to Gijs when he went home

INTO JAPANESE

彼が家に帰ったとき、私はギスと話していました

BACK INTO ENGLISH

I was talking to Gisu when he got home

INTO JAPANESE

ギースが帰ってきたとき私は彼と話していました

BACK INTO ENGLISH

I was talking to Geese when he came back.

INTO JAPANESE

ギースが戻ってきたとき、私は彼と話していました。

BACK INTO ENGLISH

I was talking to Geese when he came back.