A simple sentence has a subject and a verb. it expresses a complete thought.
Examples:
The waves crashed against the shoreline.
Apples are his favorite fruit.
The dog buried the bone.
Her hair is bright red.
He went along with their plan.
The roof is above the ceiling
I was delighted to be answering such a simple question.
Absolute Zero is the temperature at which everything freezes.
Simple predicate
She handed me the book.
I have plants.
yes you can, a very simple sentence. For example he is skipping.
Accrue holiday
I like drinking cocoa
The roof is above the ceiling
Assume the position!
She was sincere and honest.
The rules are beautifully simple
We are studying acidity.
You are an accessory to murder...
I was delighted to be answering such a simple question.