Part of speech for when?

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

* Adverb: When used to indicate time, "when" functions as an adverb.

* Example: "I'll call you when I get home."

* Conjunction: "When" can also act as a conjunction, connecting two clauses.

* Example: "I went to the store when it started to rain."

* Interrogative Adverb: When used to ask a question about time, "when" is an interrogative adverb.

* Example: "When did you get here?"

Let me know if you'd like to see more examples or want a deeper explanation of how "when" functions in each part of speech.