YOU SAID:
why did you not follow the plan?
INTO JAPANESE
なぜあなたはその計画に従わなかったのですか?
BACK INTO ENGLISH
Why didn't you follow the plan?
INTO JAPANESE
なぜあなたはその計画に従わなかったのですか?
BACK INTO ENGLISH
Why didn't you follow the plan?
That didn't even make that much sense in English.