Close can be an action verb: to close the door, or close the sale, or close your eyes.
closed is the verb, yes it tells about an action.
It is an action verb.
verb
The opposite of the adjective closed is open. The opposite of the verb closed is opened.
what follows a linking or action verb
closed is the verb, yes it tells about an action.
No, "opened" is not a preposition. It is a verb that describes an action of making something not closed or sealed.
Yes, "keep" can be a stative verb when used to describe a state rather than an action, such as "to keep the door closed."
It is an action verb.
Yes, slam is a verb. Verbs show action which slam does, unless it used as a noun. For example as a noun, "the door closed with a slam." Example for a verb, "the door was slammed shut."
began is an action verb, not a linking verb.
The word "open" can be used as both an adjective and a verb. As an adjective, it describes something that is not closed or not hidden. As a verb, it refers to the action of making something accessible or available.
action verb because you did this action (sent)
verb
The opposite of the adjective closed is open. The opposite of the verb closed is opened.
what follows a linking or action verb
An action verb