Definite and indefinite articles

We use a number of words in front of common nouns which we call determiners because they affect or determine the meaning of the noun. There are two classes:

words which help us to classify or identify words which enable us to indicate quantity
- indefinite article I bought a new shirt yesterday. - numbers I bought two new shirts yesterday.
- definite article The shirt I'm wearing is new. - quantifiers I didn't buy many shirts yesterday.
- demonstratives I bought this/that shirt yesterday.
- possessives Do you like my new shirt?

1. The definite article

1.1. The definite article with names

1.2. The definite article with geographical names

2. The indefinite article