Inside is not a verb. The word inside is a noun, a word for a thing; an adjective a word that describes a noun; an adverb, a word that modifies a verb; and a preposition. Examples:
Noun: The inside of the jacket is lined with fleece.
Adjective: Keep your ID in an inside pocket.
Adverb: They went inside the photo booth together.
Preposition: We will be arriving in Miami inside the hour.
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
The verb stay is an action verb.
Yes,waiting is a action verb
It is an action verb I was here He was there