a past action verb
"Graded" can function as both an adjective and a verb. As an adjective, it describes something that has been assigned a level or score based on a standard. As a verb, it signifies the action of assigning a grade or score to something.
A linking verb
A linking verb.
It is an irregular verb.
The verb appear can be a linking verb or an action verb.
An auxiliary verb
the infinative
a regular verb.
Is becomes a verb
It is a regular verb
Be is a state of being verb.
The kind that's actually a noun instead of a verb.