My brother is still sleeping.
Otōto wa mada neteiru.
younger brother; little brother; kid brother; pupil; apprentice
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
as yet; hitherto; only; still; not yet (with negative verb); more; besides; unfinished; incomplete; not yet finished with
to lie down; to go to bed; to lie in bed; to sleep (lying down); to sleep (with someone, i.e. have intercourse); to lie idle