* Verb: This is the most common use. It can be used as a main verb, an auxiliary verb, or part of a modal verb.
* Main Verb: "I have a car."
* Auxiliary Verb: "I have been waiting."
* Modal Verb: "I would have gone."
* Noun: This is less common, but "have" can sometimes refer to a possession, like "the haves and have-nots."
* Interjection: "Have!" (an exclamation of surprise or excitement)
To determine the part of speech of "have" in a specific sentence, look at its function and context.