1. interrogative adverb "at what time"
ex: when did you last see him?
ex:when would such a rule be justifiable?
2. relative adverb "at or on which" (referring to a time or circumstance)
ex: Saturday is the day when I get my hair done.
3. conjunction "at or during the time that"
ex: I loved math when I was in school.
ex: Call me when you're finished. 4.) preposition, acting as an adverb phrase
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "breezy" is an adjective.
The part of speech for "buried" is a verb.
The part of speech for "indefinite" is an adjective.