I think means person or thing that comes before another of the same kind a forerunner Not sure though.
Ayer Nora y yo comimos la cena en la cabaña.
Comimos is the plural form of comer and means to eat, Nora and I ate...
Claudio y yo llegábamos al hostal cuando el portero cerró la puerta.
Cerró is singular and in third person (he did), it means to close and is also in past. He closed the door.
Tú reservaste la habitación individual el mes pasado.
Reservaste is to book something, it’s in second person and in past. You booked the room...
Yo llegué en mi auto al hostal a las cinco de la tarde.
Llegué, first person and in past. It means to arrive somewhere. I arrived in my car...
