adverb
Adverb
Adverb
Adverb
adverbial clause
adverbial clause
"Before" is a subordinating conjunction that introduces a dependent clause. It is used to show the relationship between the dependent clause and the independent clause in a sentence.
Noun
dependent clause
Pertaining to what? A light switch, an oven light, a pull chain type lampholder....???
Electrical energy will turn on a light bulb. When the electrical current flows through the wires in the bulb, it creates heat and light, illuminating the bulb.
a closed circuit