EXCEPTIONS TO USING THE DEFINITE ARTICLE
There is no article:/ En estos casos no se usa el articulo "the"
•with names of countries (if singular) / con los nombres de los paìses
Germany is an important economic power.
He's just returned from Zimbabwe.
(But: I'm visiting the United States next week.)
•with the names of languages / Con los nombres de las lenguas o lenguajes
French is spoken in Tahiti.
English uses many words of Latin origin.
Indonesian is a relatively new language.
•with the names of meals./ Con los nombres de las comidas
Lunch is at midday.
Dinner is in the evening.
Breakfast is the first meal of the day.
•with people's names (if singular):/ Con los nombres de la gente en singular
John's coming to the party.
George King is my uncle.
(But: we're having lunch with the Morgans tomorrow.)
•with titles and names:/ Con los titulos y nombres
Prince Charles is Queen Elizabeth's son.
President Kennedy was assassinated in Dallas.
Dr. Watson was Sherlock Holmes' friend.
(But: the Queen of England, the Pope.)
•After the 's possessive case:/ Despuès del caso del genitivo sajòn
His brother's car.
Peter's house.
•with professions:/ Con las profesiones
Engineering is a useful career.
He'll probably go into medicine.
•with names of shops:/ Con los nombres de las tiendas o comercios
I'll get the card at Smith's.
Can you go to Boots for me?
•with years:/ Con los años
1948 was a wonderful year.
Do you remember 1995?
•With uncountable nouns:/ Con los sustantivos no contables
Rice is the main food in Asia.
Milk is often added to tea in England.
War is destructive.
•with the names of individual mountains, lakes and islands:/ Con los nombres de las montañas, lagos e islas.
Mount McKinley is the highest mountain in Alaska.
She lives near Lake Windermere.
Have you visited Long Island?
•with most names of towns, streets, stations and airports:/ Con la mayoria de los nombres de pueblos,calles, estaciones y aeropuertos.
Victoria Station is in the centre of London.
Can you direct me to Bond Street?
She lives in Florence.
They're flying from Heathrow.
•in some fixed expressions, for example:/ en algunas expresiones fijas, por ejemplo:
by car
by train
by air
on foot
on holiday
on air (in broadcasting)
at school
at work
at University
in church
in prison
in bed
http://www.edufind.com/english/grammar/DETERMINERS4.cfm