* Adjective: Describes a noun (e.g., beautiful, blue, happy).
* Adverb: Modifies a verb, adjective, or another adverb (e.g., quickly, very, always).
* Article: A word that precedes a noun (e.g., a, an, the).
* Auxiliary verb: A verb that helps another verb (e.g., have, be, do, can, will).
Let me know if you'd like more examples or explanations!