greek article

Here are the forms of the Greek article:

The following are some important facts to remember about the use of the article:

1. The article must agree with its noun, adjective, participle, etc;  see principle 7.
2. The article is often used as a possessive pronoun; see principle 18.
3. Names of persons usually omit the article.  Yet they often take it to mark them as before mentioned (anaphoric) or well known; see principle 15.
4. Abstract nouns often take the article; principle 28.
5. The article has a demonstrative force before μεν and δε in expressing contrast.
6. Nouns modified by demonstrative pronouns are nearly always articular; the pronoun either preceding the article or following the noun.
7. There is no indefinite article in Greek. The English “a” or “an” must therefore usually be omitted in translation πολις, a city.  When the writer has in mind some particular person or thing but does not name it the indefinite pronoun τις is used.  source