Definition - The subject is the person or thing that is or does what the verb says. Different kinds of words can be the subject of a sentence (nouns, pronouns, etc.) A subject can also consist of more than one word.

Examples:
             • Este país es Argentina. [This country is Argentina.]
             • María viene de Bolivia. [Maria comes from Bolivia.]

Note: in Spanish when the personal pronouns are subjects of the verb, they are usually not expressed because the verb alone indicates who performs the action.
             • Ahora voy. = Ahora yo voy. [I go now.]
             • ¿Necesitas algo? = ¿Necesitas tú algo? [Do you need anything?]

Objects are people or things on the receiving end of the action expressed by the verb, either directly (direct object) or indirectly (indirect object).

Examples of direct object:
             • Compramos los billetes. [We buy the tickets.]
             • Concha hace un pastel. [Concha is making a cake.]

Examples of indirect object:
             • Angel se olvidó de dar el regalo a su hermana. [Angel forgot to give the present to his sister.]
             • Las flores son para la señora Rodríguez. [The flowers are for Mrs Rodriguez.]