Final answer:
The underlined part 'Since you are coming over' in the given sentence functions as an adverb clause, explaining the reason for the action in the main clause. It answers the 'why' for bringing the bike, indicating the condition under which the action takes place.
Step-by-step explanation:
The sentence in question is "Since you are coming over, bring your bike as well." To identify the underlined part, we need to understand its function. Looking at the sentence structure, "Since you are coming over" provides a reason for the main clause, "bring your bike as well." This part is setting the condition under which the main action (bringing the bike) should happen.
As "since" is introducing the reason for the action, the underlined part is an adverb clause. Adverb clauses answer questions like "why," "when," "where," and "how." Considering that this clause answers the question "why should you bring your bike?", its role is clear.
Now, let's consider nouns, adjectives, verbs, and adverbs in this sentence. "You" is the noun, "coming" is the verb, and there are no adjectives or adverbs present in the adverb clause. The main clause has the verb "bring," while "your bike" functions as the object of that verb, with "your" being an adjective modifying "bike." In summary, the underlined part is an adverb clause explaining the purpose of bringing the bike.