YOU SAID:

if i kill my brother would he care?

INTO JAPANESE

もし私が弟を殺したら、彼は気にしてくれるでしょうか？

BACK INTO ENGLISH

If I killed my brother, would he care?

INTO JAPANESE

もし私が弟を殺したとしても、彼は気にするでしょうか？

BACK INTO ENGLISH

If I killed my brother, would he care?