Final Answer:
Prepositional phrases in the sentence: "along the edge of the river" and "of the river."
Step-by-step explanation:
The sentence "We walked along the edge of the river gathering rocks" contains two prepositional phrases that offer crucial details about the action.
The first prepositional phrase, "along the edge of the river," starts with the preposition "along," indicating the direction or path of the action—the act of walking. This phrase includes "the edge" as its object, modified by "of the river."
Here, "the edge" specifies a precise location, emphasizing proximity to the river, while "of the river" provides additional context about the edge's specific placement in relation to the river. It vividly describes the pathway taken, enhancing the imagery by highlighting the closeness to the riverbank.
The second prepositional phrase, "of the river," might be shorter but holds significance. In this instance, "of" acts as the preposition linking "the river" as its object. This phrase denotes the relationship between the edge and the river itself.
It conveys possession or association, clarifying that the edge referred to is directly connected to or a part of the river's vicinity. Together, these prepositional phrases not only add depth and detail to the action of walking but also provide spatial context, painting a clearer picture of the scenario.