Hello. You did not show the list of words that should be classified as link verbs, action or predicate nominative. For that reason, I will show you how to identify these types of words. I hope it helps you.
Action verbs are those that present a type of activity, they are significant verbs and are usually linked to movements and physical things, such as running, playing, dragging, jumping, writing, reading, walking, cleaning, among others.
The connecting verbs, on the other hand, present a state and do not indicate an action, an activity, but something related to the characteristics of the subjects, such as thinking, being, compromising, among others.
A nominative predicate is a word that complements a verb, extending the meaning of the sentence and making it coherent. An example of this is the phrase "Bob is my cat." Where the expression "my cat" is the nominative predicate.