You have to say, "Sam dined," not, "Sam dined the pizza." A transitive verb mandates that there has to be an object there: "Sam devoured the pizza." You can't just say, "Sam devoured." There are dozens or scores of verbs of this type, each of which shapes its sentence.
Debes decir, "Sam murió", no "Sam murió una muerte". Un verbo transitivo debe llevar un objeto directo: "Sam devoró la pizza". No puedes decir solamente "Sam devoró". Existen docenas o veintenas de verbos de este tipo y cada cual da forma a su frase.