In English we have simple grammar rules for articles, compared to other languages.
We have 4 articles:
A /An = Singular Nouns
The = Singular or Plural Nouns
(None) = Plural Nouns
When we are speaking to someone about something in –general we use A or An for a non specific noun.
I want a dog
in this example, what dog do I want? …..That is right, – ‘any’ dog. So A is ANY
That makes the listener think of the same object as you do.
I want the dog I saw yesterday.
in this example, what dog do I want? …..That is right, ‘the” dog i saw yesterday. So THE is that specific noun (dog)
I love seeing dogs at the pet store.
in this example, which dogs?… That is right, any dogs 🙂