Respuesta :
The adverb clause in this sentence is B. Before I was able to fall asleep.
An adverb clause functions the same way a simple adverb does in a sentence - it answers questions such as - where, when, why, how, etc.
An adverb clause functions the same way a simple adverb does in a sentence - it answers questions such as - where, when, why, how, etc.
Answer:
The complete adverb clause in the sentence above is "before I was able to fall asleep" (B).
Explanation:
An adverb clause is a dependent clause that functions as an adverb in a sentence. They generally answer questions like how, why, where, and when. As they function as adverbs, they describe an adjective, another adverb, or a verb. And, as they are clauses, they are introduced by a subordinating conjunction which connects them to the rest of the sentence. In this case, the adverbial clause has been introduced by the subordinating conjunction "before". The clause gives information regarding the time in which the speaker was about to fall asleep: He/she did so after having woken up his/her sister.