What type of parts speech is know?

"Know" can be a few different parts of speech, depending on how it's used in a sentence:

* Verb: The most common use. Example: "I know the answer."

* Noun: Can be used to refer to knowledge itself. Example: "I have a lot of know-how."

* Adjective: A less common usage, but possible. Example: "He's a know-it-all."

The specific part of speech depends on the context of the sentence.