For diagramming practice, here are some sentences that feature participles and gerunds. Enjoy the practice.

1. Flying is fun. [solution]
2. Superman loves bending steel bars. [solution]
3. Howling at the moon, Sam contemplated his first date. [solution]
4. Danny, thinking clearly of the future, studied diligently. [solution]
5. Circling the globe, Magellan grew sick of rowing. [solution]
6. Is thinking about dancing a crime? [solution]
7. Ben, swimming will not make you an athlete by itself. [solution]
8. The lost campers were considering changing direction [solution]
9. Forgotten for centuries, the treasure was coveted by many adventurers dreaming of riches and glory. [solution]
10. Smiling at the student partly hidden behind a desk, the teacher asked the terrified student a challenging question. [solution]