Interested in is what part of speech?

"Interested" can be several parts of speech depending on its use in a sentence:

* Adjective: Describing a noun. Example: "She is interested in art."

* Verb: Describing an action or state of being. Example: "I interested myself in the history of the city."

* Past participle: Used as part of a verb phrase. Example: "They were interested in learning more."

To determine the correct part of speech, you need to look at the context of the sentence.