All terms in this list:

Mandó una carta.: He sent a letter.

Mandaste una carta.: You sent a letter.

Mandé una carta.: I sent a letter.

Mandamos una carta.: We sent a letter.

Mandaron una carta.: They sent a letter.

Hablé con el ayer.: I spoke with him yesterday.

Hablaste con el ayer.: You spoke with him yesterday.

Caminó a la escuela ayer.: He walked to school yesterday.

Cocinamos paella anoche.: We cooked paella last night.

Compraron una casa el año pasado.: They bought a house last year.