The word until can BEGIN an adverb clause, but it is not an adverb by itself. The word until is a preposition or conjunction.
There isnt one but there is an adverb clause
adverb
It modifies a verb, adjective, or an adverb.
The temperature falls fast when the sun sets. When the sun sets is an adverb clause. Adverb clauses are introduced by subordinating conjunctions. Although,after, because, when, etc.
Adverb, answering the question "When?"
The clause "until my room was cleaned" is an adverb clause, which begins with an adverb (until) acting as a conjunction.
Adverb clause
Since it answers the question 'When?', the clause functions as an adverb.
The adverb clause is everything after the word Land. The word "until" is a subordinating conjunction that connects the dependent clause, which acts as an adverb. The two phrases (to the Northwest Territories, in 1868) are adverbial phrases.
An adverb clause is a group of words that functions as an adverb in a sentence. It typically includes a subject and a verb and provides information about when, where, why, or how an action is taking place. Adverb clauses can appear at the beginning, middle, or end of a sentence.
The adverb clause is "when the moon is full." The subordinating conjunction is when, the subject is moon, and the verb is "is."
An 'adverb clause' is a subordinate clause that modifies a verb, an adjective, or another adverb. It tells when, where, how, to what extent or under what conditions.
The independent clause is "Mom wouldn't let me go to the party" This is a separate clause that could be it's own sentence.The dependent clause is "until my room was cleaned" (adverb clause).
adverb clause
It is an adverb clause. It will say "when" an activity may take place.
The independent clause is "Mom wouldn't let me go to the party" This is a separate clause that could be it's own sentence.The dependent clause is "until my room was cleaned" (adverb clause).
When he was young ... - as in When he was young he did some very foolish things - is an adverb clause of time.