YOU SAID:
May I join that project
INTO JAPANESE
きみはその計画に参加しなければならなかった。
BACK INTO ENGLISH
You had to join that project. [M]
INTO JAPANESE
きみはその計画に参加しなければならなかった。
BACK INTO ENGLISH
You had to join that project. [M]
That didn't even make that much sense in English.