What is the main role of verbs in a sentence?

The main role of verbs in a sentence is to express an action or state of being. Verbs are essential components of sentences, as they indicate what the subject is doing or the condition it is in. For instance, in a sentence like "She runs," the verb "runs" illustrates the action performed by the subject "She." Similarly, in a sentence such as "He is happy," the verb "is" signifies the state of being of the subject "He."

This distinction is crucial because it underscores the significance of verbs in conveying the primary dynamic of a sentence. Without verbs, sentences would lack the ability to communicate actions or states, making them incomplete. The ability of verbs to function in this capacity makes them one of the core parts of speech, and their presence in a sentence is what allows for clear expressions of both physical actions and emotional or conditional states.