It can be either. As a preposition, it answers the question "when."
"Until" can function as both a preposition and a conjunction. As a preposition, it is used to specify a point in time or an event. As a conjunction, it is used to introduce a clause indicating the time when something will happen.
No, it is a conjunction or a preposition
Yes, it is a preposition. It can also be used as a conjunction.
No, "until" is a preposition or subordinating conjunction, used to indicate when something is expected to happen or the point in time up to which an action or state is expected to last. It can also be used as a conjunction in some contexts.
Until is either a preposition ("until the end") or a subordinating conjunction ("until the end comes").
Until is either a preposition ("until the end") or a subordinating conjunction ("until the end comes").
Yes, it is a preposition. It can also be used as a conjunction.
"Until" is a conjunction, not a preposition. It is used to indicate when a specific event or action will happen or the time leading up to that event.
If is not a preposition. It is a conjunction.
The word either is not a preposition. It can be an adjective, adverb, or part of a conjunction (with or).
Until is not an adverb, it can be a preposition or a conjunction, depending on the usage.(see related link)
No. The word until is a preposition or conjunction, and more rarely may be considered an adverb.