sheep
The Italian word for sheep is 'pecora'. It is used in the same way as in English, it can refer to the animal itself or its wool. The plural form of 'pecora' is 'pecore'.
The sheep is sleeping in the field.
This phrase is a simple declarative sentence where 'pecora' is presented as a subject that is performing an action, which is 'sleeping in the field'.
Giovanni has a sheep in his yard.
This sentence introduces the word 'pecora' within a situation. Giovanni is the owner of the sheep which is kept in his yard.
I see a white sheep.
In this example, 'pecora' is an object that is being seen. It's further described as white, adding more detail to the understanding of the object.