YOU SAID:
never gonna give you up, never gonna let you down, never gonna run around and desert you
INTO JAPANESE
決してあきらめない、決して落胆せず、走り回ってあなたを捨てない
BACK INTO ENGLISH
Never give up, never be discouraged, run around and throw you away
INTO JAPANESE
決してあきらめず、落胆することなく、走り回ってあなたを捨てる
BACK INTO ENGLISH
Never give up, do not be discouraged, run around and throw you away
INTO JAPANESE
決してあきらめず、落胆せず、走り回ってあなたを捨てる
BACK INTO ENGLISH
Never give up, do not be discouraged, run around and throw you away
That didn't even make that much sense in English.