Yes, held is an action verb.
No, "firmly" is an adverb, not a verb. It is used to describe how an action is performed, such as "he held the rope firmly."
It is an action verb.
began is an action verb, not a linking verb.
action verb because you did this action (sent)
what follows a linking or action verb
An action verb
Action verb
It is an action verb.
Action verb
action verb
No. Held is the past tense (and participle) of "to hold." It can create a participial phrase, but it is not a preposition.
The verb stay is an action verb.