YOU SAID:

tonight i gotta have myself a real good time

INTO JAPANESE

今夜は本当に楽しい時間を過ごさなければなりません

BACK INTO ENGLISH

I have to have a really good time tonight

INTO JAPANESE

今夜は本当に楽しい時間を過ごす必要があります

BACK INTO ENGLISH

I have to have a really good time tonight