YOU SAID:

he left me to fend for myself when he knew he still had somebody else

INTO JAPANESE

彼はまだ誰かがいることを知ったとき、私を自分で守るために残しました

BACK INTO ENGLISH

He left to protect me when he found out that someone was still there

INTO JAPANESE

誰かがまだそこにいることを知ったとき、彼は私を守るために去りました

BACK INTO ENGLISH

He left to protect me when he learned that someone was still there

INTO JAPANESE

誰かがまだそこにいることを知ったとき、彼は私を守るために去りました

BACK INTO ENGLISH

He left to protect me when he learned that someone was still there