YOU SAID:
What time do you have to go to bed?
INTO JAPANESE
あなたは何時に寝なければならないのですか。
BACK INTO ENGLISH
What time will you have to go to bed?
INTO JAPANESE
あなたは何時に寝なければならないのですか。
BACK INTO ENGLISH
What time will you have to go to bed?
That didn't even make that much sense in English.