YOU SAID:
You must be fun at parties.
INTO JAPANESE
あなたはパーティーで楽しくなければなりません。
BACK INTO ENGLISH
You must have fun at the party.
INTO JAPANESE
あなたはパーティーで楽しんでいなければなりません。
BACK INTO ENGLISH
You must be having fun at the party.
INTO JAPANESE
あなたはパーティーで楽しんでいなければなりません。
BACK INTO ENGLISH
You must be having fun at the party.
This is a real translation party!