Vivir means to live.
  Vivir is a regular -ir verb.
   To say you were living or you used to live,
    use the imperfect ending.

Cuando era pequeño vivía en Moscú.
      When I was little I used to live in Moscow.

Tú vivías enfrente de mi casa.
      You used to live in front of my house.

Ud. vivía en una caja.
      You used to live in a box. (formal)

Vivíamos en Madrid.
      We used to live in Madrid.

Vosotros vivíais cerca de la entrada a la ciudad.
     You all used to live near the entrance to the city.

Ellos vivían en la esquina.
      They used to live around the corner.