The dog is playing with the cat.
El perro es jugando con el gato.
El perro está juga con el gato.
El perro está jugando con el gato.
El perro estoy jugando con el gato.

No se

First of all we may refer to the things in classroom in spanish as both los artículos del aula de clases  and los objetos de la clase  we will begin by looking at a picture containing several of these items. we will see them in sentences later to hear  their pronunciation and how they could be used in real contexts