We use a, an or no article, to talk about general objects - ones that are not special or unique and ‘the’ to refer to specific things, or when we understand which noun you are talking about.
I think I'll have an apple.
I think I'll buy a cake.
I'm going to study at the library.
I'll meet you at the cinema.
I think I'll have chocolate.
There is no article before ‘chocolate’ because ‘chocolate’ is an uncountable noun.
With uncountable nouns, we can use ‘the’ or no article.
For example, we can say,
I like chocolate - In this example, we don't use an article because chocolate is uncountable and you like chocolate in general.
I like ‘the’ milk chocolate.- in this example, we use an article because you are referring to a specific kind of chocolate (milk chocolate).
Most material and abstract nouns are uncountable, for example when we say ‘Love is a beautiful thing’ or ‘Paint comes in many different colours’. Here we are talking about general things- not a specific loving relationship or a specific unit of paint.
We use ‘the’ with specific things in a group, for example
The most talented in THE orchestra.
THE best at Spanish in the class.
For places, when we know where you are talking about eg.
I am going to the Shop – when we know WHICH specific shop you are talking about.
And for natural and man-made wonders that are specific and unique, like
Or THE Taj Mahal.
You can watch our video on definite and indefinite articles to find out more and for more explanations and examples.