They rested when evening came. The underlined group of words in the above sentence is a/an :

Question

Accepted Answer

The underlined group of words, "when evening came," is an **adverb clause** because it modifies the verb "rested" by telling us *when* they rested.

Here's why Option 3 is correct and the other options are incorrect:

*   **Option 3: Adverb Clause (Correct)** An adverb clause functions as an adverb within a sentence. It modifies a verb, adjective, or another adverb. In this case, the clause "when evening came" modifies the verb "rested" by specifying the time of the action. It answers the question "When did they rest?" This is a key characteristic of adverb clauses – they often answer questions like when, where, why, how, how much, or under what condition.

*   **Option 1: Adjective Clause (Incorrect)** An adjective clause modifies a noun or pronoun. It typically begins with a relative pronoun (who, whom, which, that) or a relative adverb (where, when, why). The clause "when evening came" does not modify a noun or pronoun; it modifies the verb "rested." Therefore, it cannot be an adjective clause.

*   **Option 2: Noun Clause (Incorrect)** A noun clause functions as a noun in a sentence. It can act as a subject, object, complement, or appositive. The clause "when evening came" does not function as a noun. It doesn't act as the subject, object, or complement of any verb in the main clause. It provides information about the timing of the action.

*   **Option 4: Conjunction Clause (Incorrect)** There is no such thing as a "conjunction clause." Conjunctions are words that connect words, phrases, or clauses. While the word "when" acts as a subordinating conjunction introducing the clause, the entire clause itself is not a "conjunction clause." The clause has a subject ("evening") and a verb ("came") and functions as an adverb.