ARTICLES

The indefinite article - a

The indefinite article is the a is the same for all genders.
a boy, a girl, a cat

The indefinite article has no plural form.
a boy - boys

We use an if the following word starts with a vowel.

USES...

The definite article - the

The definite article the is the same for all genders in singular and in plural.
the boy, the girl, the cat, the computers

                             NO ARTICLE                                                   THE

No article/Zero article

1. Do not use an article with countries, states, counties or provinces, lakes and mountains except when the country is a collection of states such as "The United States".

• He lives in Washington near Mount Rainier.
• They live in Northern British Columbia.
• They climbed Mount Everest.

2. we do not normally use an article with plurals and uncountable nouns to talk about things in general.:

• He writes books.
• She likes sweets.
• Do you like jazz music?
• She ate bread with butter in the morning.

EXTRA PRACTICE

http://www.englisch-hilfen.de/en/exercises_list/artikel.htm
http://www.myenglishpages.com/site_php_files/grammar-exercise-articles.php#.UvRZiv1lO5c
http://www.englishexercises.org/makeagame/viewgame.asp?id=4378
http://www.learn4good.com/languages/evrd_grammar/article_ex.htm
http://www.agendaweb.org/grammar/articles-beginners-exercises.html