rushed
It is an action verb.
Yes, it is the past tense of rush.
No, "rushed" is not a preposition. It is an adjective used to describe something that is done quickly or in a hurry.
began is an action verb, not a linking verb.
"Sent" is an action verb. It shows an action, such as "she sent an email."
what follows a linking or action verb
It is an action verb.
action verb
Action verb
Action verb
An action verb