Question

quando devemos usar o artigo A​

Answer 1

Resposta:

The article a / an is used when we don't specify the things or people we are talking about:

I met a friend.

I work in a factory in New York.

I borrowed a pencil from a passenger sitting next to me.

The indefinite article a is used before a consonant sound:

a dog.

a pilot

a teacher.

a university

The indefinite article an is used before a vowel sound:

an engineer.

an elephant.

an athlete