YOU SAID:
I am not bad at fortnut
INTO JAPANESE
Fortnut が下手ではないです。
BACK INTO ENGLISH
Bad Fortnut is not.
INTO JAPANESE
悪い Fortnut はありません。
BACK INTO ENGLISH
Not a bad Fortnut.
INTO JAPANESE
悪い Fortnut ではないです。
BACK INTO ENGLISH
Not a bad Fortnut.
You've done this before, haven't you.