YOU SAID:
If only there had been time before your brother died.
INTO JAPANESE
兄が死ぬまで時間があったらよかったのに。
BACK INTO ENGLISH
I wish I had some time before my brother died.
INTO JAPANESE
兄が死ぬまで少し時間があったらいいのに。
BACK INTO ENGLISH
I wish I had some time before my brother died.
That didn't even make that much sense in English.