Subordinating conjunction because subordinating conjunctions are parts of speech that join dependent clauses to independent clauses. Sometimes referred to as subordinators or subordinate conjunctions, these important words and phrases may also introduce adverb clauses. In the following examples, the subordinating conjunctions are in bold for easy identification:

As Sherri blew out the candles atop her birthday cake, she caught her hair on
fire.
Sara begins to sneeze whenever she opens the window to get a breath of
fresh air.
When the doorbell rang, my dog Skeeter barked loudly.