As you may know, and adverb is a word that has the function in a sentence of modifying a verb. Sometimes a group of words (known as a phrase) can function together as an adverb, and the phrase is called an adverb clause. That said, in the sentence, the adverb clause is “when the rain stops.” To help us determine what word “when the rain stops” we can ask what happens when the rain stops. The answer to this is “put”—the dog will be put in the yard.
