* The dog barks. (Verb: barks)
* She sings beautifully. (Verb: sings)
* We walked to the park. (Verb: walked)
* The sun shines brightly. (Verb: shines)
* He eats breakfast every morning. (Verb: eats)
These sentences all use main verbs to express the action or state of being. They don't need helping verbs to form the sentence structure.