The word not is an adverb. It is used to modify verbs, adjectives, and other adverbs, typically to negate the meaning of the word or phrase it precedes. For example, in the sentence She is not coming, the word not modifies the verb coming, indicating that the action is not taking place.
In English, not is a crucial part of forming negative sentences and is often used in conjunction with auxiliary verbs like do, have, and be. For instance, I do not like coffee or They have not finished their homework.
Understanding the role of not as an adverb helps in constructing grammatically correct sentences and conveying the intended meaning clearly.