駄目なの

do I have to?

→ 駄目だ
phrase Rare #41,179
do I have to? When used after なきゃ, it asks whether something is necessary. In other contexts, 駄目なの can mean “is it no good?” or “is it not allowed?”
JA: もう帰らなきゃ駄目なの?
EN: Do I have to go home already?

トムは今日家にいなきゃ駄目なの?

Does Tom have to stay home today?

今すぐ行かなきゃ駄目なの?

Do I really have to go right now?

なぜ駄目なの?

Why not?

— 荒野の用心棒 (1964)

この手紙、英語で書かなきゃ駄目なの?

Do I have to write this letter in English?