Every sentence that is not a command uses both a subject and a verb.
A command sentence (an imperative) begins with a verb and has no written subject.
Be quiet!
Stop talking.
Sit down.
These are commands that have no written subject. All other sentences need both a subject and a verb.
Here are simple sentences with both a subject and a verb.
John washed the car.
Susan ate dinner.
Mom baked a cake.
Bill rode his bike.
Notice how each sentence begins with a subject (a noun) and that subject does an action (the verb).
A simple sentence needs both a subject and a verb.
▶It’s your turn. Find the subject and the verb in this simple sentence. My dog barked. Did you find the noun that is the subject and the verb that shows the action? Good for you!