== The Article ==
English has a definite article ("the") and an indefinite article ("a" or "an").
Irish has only a definite article. In situations where "a" or "an" would be used in English, the noun is used with no article.
The definite article has two forms: an and na.
an is used in front of singular nouns
na is used in front of plural nouns (and feminine nouns in the genitive case).
== Grammatical Changes ==
The singular definite article "an" may change the noun it is applied to, depending on the first letter and gender of the noun:
The plural definite article "na" changes the noun based only on its first letter: