4. Definite and Indefinite Articles and Demonstratives | Singular Masc. Singular Fem. Plural Masc. Plural Fem. | the
a, an
this
that
that | el
un
este
ese
aquel | la
una
esta
esa
aquella | the
some
these
those
those | los
unos
estos
esos
aquellos | las
unas
estas
esas
aquellas | Note: El is also used with feminine nouns beginning with a or ha when the accent is on the first syllable. Use the ese froms to mean that when what you are talking about is near the person you are addressing. Use the aquel forms when what you are talking about is far from both you and the person you are addressing. Esto and eso are the neuter forms of this and that. They can be used in general and abstract ways. | 
