Some words can be an action verb or linking verb.
It is an action verb if the verb tells the action someone is taking.
It is a linking (state of being) verb if it tells how someone is.
Look at the picture on the right.
The words in green are the action verbs.
They show an action that is, will, or has
The words in orange are the linking (or
state of being) verbs. They tell something
about the person or thing in the sentence.
If you smell cookies, we know what you smell like not what you are doing. Your state of being is that you smell like cookies! So, smell is a linking verb in that sentence.
If you smell like cookies, we know what
you smell like: cookies!