- grows – action verb
- looked – action verb
- is – linking verb
- are – linking verb
- appears to be – linking verb
An action verb shows action or tells what the subject does.
A linking verb links or connects the subject to either a predicate noun or a predicate adjective. A linking verb is usually a form of the BE-verb. However, other non-BE- can also be used as linking verb.
To check if a verb is linking, try substituting it with a BE-verb. If the sentence retains its meaning, then that verb is a linking verb.
Try sentence 5 above.
Sheila appears to be in first place in this race. Sheila is in first place in this race.
(Note: The sentence retained its meaning, so the verb is linking.)