A simple sentence tells about one thing. It usually has one subject and one verb. However, it can have one subject doing two actions. When that happens, it is a simple sentence with a compound verb. Look at these examples of a simple sentence with a compound verb:
Janet reads and exercises every morning.
Mom raked and bagged the leaves.
My dog barked and ran around the room.
We sanded and painted the old table.
Sometimes a simple sentence has one subject and a compound verb.
It’s your turn. Find the compound verb in this simple sentence: The little baby fussed and cried. Did you find the two words that show action in this simple sentence? Good for you.