I don't know when they use a or the, an or the, and sometimes use nothing.
Could you give me some tips about that?
The articles, in other words, are called "little words" because they might not be hard to learn. Yet, it takes some patience to notice as well as observe the common uses of them. I agree with Rachada, you should get a few grammar books that also concern the uses of articles on hand and learn them.
I've got a few words about the articles.
the (definite article) (+ singular/plural nouns; uncountable nouns)
-known
-understood
-mentioned
a/an (indefinite articles) (singular countable noun)
-unknown
-not understood
-not mentioned before
Ex: (Known)
The sun shines.
(understood) I have bought
the news you read every day.
(mentioned) I bought a grammar book. Everyone can go for it.
The book has some good points to read.
Ex: I am a student.
I've got a car. (not known)
I met a girl. (not mentioned/understood)...
