Simple Sentences:
* The old man hummed a happy tune as he strolled down the street.
* The engine hummed softly, a comforting sound in the quiet night.
* She hummed along to the music, tapping her foot to the beat.
More Complex Sentences:
* As the sun set, the birds hummed their last songs of the day.
* He hummed a melody so familiar, it triggered a wave of childhood memories.
* The wind hummed through the trees, creating a ghostly symphony.
* The data center hummed with the constant buzz of servers and cooling systems.
Figurative Language:
* The city hummed with activity, its streets filled with people rushing to and fro.
* The anticipation in the room hummed with excitement.
* The tension hummed between the two rivals, threatening to erupt at any moment.
These examples demonstrate the versatility of "hummed" as a verb. It can describe the sound of a machine, a person singing softly, or even an abstract feeling.