As
* Preposition: Indicates a relationship or comparison, often followed by a noun or pronoun.
* Example: "He works as a doctor."
* Conjunction: Introduces a clause that shows comparison or similarity.
* Example: "She sings as well as her sister."
* Adverb: Modifies a verb, adjective, or another adverb, indicating manner, degree, or time.
* Example: "The car drove as fast as it could."
Or
* Conjunction: Connects words, phrases, or clauses, indicating an alternative or choice.
* Example: "Would you like tea or coffee?"
* Interjection: Expresses a strong emotion, often used in informal writing.
* Example: "Oh, or maybe I should just stay home."
It's important to look at the context of the sentence to determine the specific part of speech of "as" or "or."