Diagram these sentences that include prepositional phrases
1. Edward Frost made famous rug patterns and sold them along the New England roads.
2. These old rugs were useful and beautiful to the eye.
3. During the nineteenth century, rug making was popular.
I was having trouble with these 3.
The important thing in diagramming sentences is to be sure you understand the bare bones of the sentence, in other words, the major players such as subject, verb, and object (or complement with a "to be" type verb).
Example: The large leafy maple reached the top of my window.
Bare bones: maple reached top