A verb is a word that has action. A verb phrase is part a sentence that includes a verb and an object.
The letter I is not a noun , yet I is pronoun . I is a pronoun because it replaces a noun. For example if you had a really long name you wouldn't want to always say that when you say something. You would say I .
Linking Verb & Action Verb
A linking verb is when you attach words together that shows a action. A action verb are verbs that describes what the subject is doing. The difference between the two is that a action verb describes action and a connects the subject and the doing of it.