Tyson was hitting the golf ball.
(notice the main verb “hitting” is an action verb)
Janice is skating down the street.
(notice the main verb “skating” is an action verb)
Li had read the book this morning.
(notice the main verb “reading” is an action verb)
Charlotte had been the president of the club.
(notice the main verb “been” is a linking verb)
I could be the smartest student in the room!
(notice the main verb “be” is a linking verb)
The parents might have been our best fans in the crowd.
(notice the main verb “been” is a linking verb)