have to eat
食べなきゃダメだ。
I have to eat.
これ食べなきゃダメ?
Do I have to eat this?
どうしても食べなきゃダメ?
Do I really have to eat it?
— 魔女の宅急便 (1989)
それに何か食べなきゃダメね
Besides, I have to eat something.