YOU SAID:
Haven’t you done this already
INTO JAPANESE
もうやってないの?
BACK INTO ENGLISH
Haven't you done it yet?
INTO JAPANESE
まだ終わってないの?
BACK INTO ENGLISH
Aren't you done yet?
INTO JAPANESE
まだ終わってないの?
BACK INTO ENGLISH
Aren't you done yet?
That didn't even make that much sense in English.