Seek Help (Semi-Modals)

[Bnplbnpl]

Hello everyone,

To my knowledge, “modal + pronoun” can form a question tag of a statement, such as “Cooking can be fun, can’t it?”. However, if a statement is with a semi-modal, do we also start the tag with the semi-modal as the following sentences?

1) We needn't cook so many dishes, need we?
2) No one need know his whereabouts, need they?
3) My brave sister dare go out alone after dark, daren’t she?

I’m looking forward to hearing from any one of you. Thank you in advance.

Best wishes,
bnplbnpl

[Josef Essberger]

My brave sister dares go out alone after dark, dare she?