It is an action verb.
began is an action verb, not a linking verb.
Yes, it is a compound word for the action and the sound.Hearing his heart beat is essentially saying the same thing as hearing his heartbeat, except that in the former, beat is a verb.
what follows a linking or action verb
action verb because you did this action (sent)
It is an action verb.
action verb
Action verb
Action verb
An action verb
The verb stay is an action verb.
Yes,waiting is a action verb