Diese Form tritt vorwiegend in der Umgangssprache auf. in k-in-sc's sentence. The auxiliary verb or verb to be in the statement matches the verb used in the tag.
Hilfsverb must. Examples 3.1. with auxiliaries. This is a free multiple-choice quiz that you can do online or print out.

They are put at the end of the sentence. It is an excellent way to do introduce yourself and your channel to the world. However, as noted at that question, hardly is a strange word, and in particular, I suddenly have cause to wonder how hardly (and its compatriots in strangeness, rarely and seldom) work with tag questions and agreements. A tag question is a question added to a declarative sentence, usually at the end, to engage the listener, verify that something has been understood, or confirm that an action has occurred.Also known as a question tag. Transposition to the present tense keeps the compulsion for both statement and tag, so there's no conflict: [6a] She must pay her taxes, mustn't she? Learn English Grammar - Tag Questions - You know how to form tag questions, don't you?
No, we need n't. Question tags are a type of question that are used to confirm information we already know about or to show surprise. Read the explanation to learn more.

For example, in the sentence "You're John, aren't you? The usage of “don’t they” in this example follows the rule for all question tags: We take the auxiliary verb from the main clause and use it in the tag. The New Youtuber tag video focuses on you as a YouTuber. or didn't they? I suppose that for “needn’t”, we would simply follow the same rule we apply to other negative auxiliaries: use the positive form in the tag. We often use question tags when we expect the listener to agree with our statement. Question tags are used in spoken English, but not in written English.

positive statement → question tag negative → You are Tom, are n't you? Yes, we must. Question tags are formed with an auxiliary verb and the appropriate personal pronoun. Positive Statements. Question Tags to krótkie pytania dodawane na końcu zdania. * “He needn’t come, need he?” But to me, there’s there’s something odd about that sentence. You 've got a car, have n't you? To make a question tag, use the first auxiliary (forms of to be, have) or modal verb (must, can, will). 3.2. without auxiliaries (don't, doesn't, didn't) They play football on Sundays, do n't they? Question tags are used in spoken English, but not in written English. If a modal (can, could, will, should, etc.) If there is an auxiliary, a modal verb or the verb to be in the main clause, we use that in the question tag.. You’re in a desert in the middle of Australia, aren’t you?