Be being been am is are was were.
Give me example of linking verb. Alberto was a great philosopher. Lot more interesting detail can be read here. If the sentence does not make sense its an action verb.
The brownies smell delicious. Linking verbs do not express an action but instead link a sentences subject to more information about the subject. Their use determines if they are an action verb or a linking verb.
The room appears darker than usual. Examples of Linking Verbs. A linking verb is a finite verb which does not indicate any action rather describes the subject itself.
The most common linking verb is the verb to be in all of its forms eg am is are was were will be was being has been. Feel taste smell look grow. In the action.
It is very similar to look which is also a possible linking verb She seems nice look The doctor seems to be positive about this surgery. All forms of the verb be are always linking verbs. Feel taste smell look grow.
Additionally this total includes about 15 more verbs that can also be action or helping verbs. Other verbs can be linking verbs or action verbs. There are so many linking verbs.