* Preposition: This is the most common use. "After" shows the relationship between a noun or pronoun and something else.
* Example: "We went to the park after school."
* Adverb: "After" can modify a verb, adjective, or another adverb, indicating time or sequence.
* Example: "The train arrived after the scheduled time."
* Conjunction: "After" can introduce a subordinate clause that follows a main clause, showing a cause and effect relationship.
* Example: "He finished his homework, after which he went to bed."
To determine the part of speech, consider how "after" functions in the specific sentence.