you make my entire ballbag moist.
that soccer player had been run for the whole entier game
She stood aghast as her home for her entire life burned to the ground.
He was staring at her, lost in her beauty. The entire room was staring daggers at the new arrival.
The entire family was intrigued.
complex
I'll need to use the entire deck of cards for my next trick. The entire class stood up and cheered.
I harvested the entire field of corn before noon.
No, a prepositional phrase on its own cannot be considered a complete sentence because it does not have a subject and a verb. A complete sentence must express a complete thought.
If the salacious information goes public, it will disgrace the entire family.
I capered to the ending of the novel as I had no time to read the entire novel .
Horses are found throughout the entire world
After drinking an entire bottle of Vodka, Sam was completely inebriated.
that soccer player had been run for the whole entier game
She stood aghast as her home for her entire life burned to the ground.
Yesterday, the entire city was under a blackout.
Basically, you say the entire sentence without any variance in tone. No upturning of your words. Watch an episode of Daria, that's how you make a sentence with monotony. Unless, you're asking how to form a sentence that is in itself monotonous. In that case, you can't really because that's much more subjective.
The entire door was removed to make the theater accessible in case of fire.