Answer:
Amy put on her tennis shoes to go for a walk, but the phone rang before she could leave.
Explanation:
I believe this is the compound sentence because the first subject is Amy and how she is putting on her shoes. While the second subject is about the phone ringing.
Correct me if I'm wrong.
AnswerAmy put on her tennis shoes to go for a walk, but the phone rang before she could leave.
Explanation: