What part of speech is “do-not”

'do not' is a combination of auxiliary verb and negation. 'Do' is an auxiliary verb, also known as a helping verb. In 'do not,' it's used to form the negative of the base form of main verbs in the present simple tense (except for the verb 'to be'). The word 'not' serves as the negation. Together, they negate a verb in the present simple tense.

used for forming the negative of the present simple tense, asking negative questions in the present simple tense, and emphasizing a negative statement in the present.

I do not like broccoli.

Do not you want to join us for the movie?

They do not just ignore the rules; they actively break them.

'Do not' is often contracted to 'don't' in informal speech and writing. For example, 'I don't like broccoli.'Be cautious about double negatives. Since 'do not' already provides negation, the main verb should be in its base form without any other negatives. For instance, 'I do not know' is correct, while 'I do not not know' is incorrect. In questions, the subject and 'do' switch places, but 'not' remains after the subject. For example, 'Do you not want to go?' This structure can sound formal, and in informal contexts, it's more common to use the contraction

'Don't you want to go?' 'Do not' is specific to the present simple tense. It's not used with other tenses. A common mistake is using 'do not' with the verb 'to be.' The correct form is 'am not,' 'is not,' or 'are not' (or their contractions 'aren't' and 'isn't').