Indefinite and definite article; nouns

INDEFINITE AND DEFINITE ARTICLES AND NOUNS

NOUNS
Common nouns can be count or noncount. 
Count nouns can be use with numbers. They have both singular and plural forms. 
Noncount nouns cannot be used with numbers. they do not have plural forms.
Common nouns that occur with an indefinite article or no article are infinite nouns 
Common nouns that occur with a definite articles are definite nouns.
 
COUNT NOUNS:

SINGULAR:(one) banana-(one) physician
PLURAL:(two) bananas-(two) physicians

NONCOUNT NOUNS:
Research
Soup

INDEFINITE ARTICLES  
Indefinite articles can occur before a singular count noun(an apple) or before and adjective + singular count noun(a green apple) 
Use an before words that begin with vowel sound; use a before all others.
 An apple
 A banana
If a noun begins with the letter "h" use an if the h is not pronounced. Use a if the h is pronounced.
 an hour/ an honor  
 a house/a human  
 If a noun begins with the letter "u" use an if the u is a short vowel. Use a if the u is pronounced like the y in yellow.
  an umbrella/an understanding 
  a unit/a utensil
Do not use indefinite articles before plural count nouns or noncount nouns.
Some and any often act like indefinite articles with plural count or noncount nouns. We often use some in affirmative sentences and questions and any in negative sentences and questions.
Indefinite articles, some, and any do not have o be repeated when nouns are combined with and. banana and (an) apple. some fruit and (some) cereal    
  
COUNT NOUNS:
  
SINGULAR:A/AN+SINGULAR COUNT NOUN-a banana/ an apple
PLURAL:---+ PLURAL COUNT NOUN| ---bananas/ --- apples
SOME/ ANY+PLURAL COUNT NOUN- some bananas/any apples

 NONCOUNT NOUNS

------ + NONCOUNT NOUN|----fruit
 SOME/ANY +NONCOUNT NOUN- any fruit/some fruit  

DEFINITE ARTICLES

The definite articles the can be used before all common nouns-sigular and plural count nouns and noncount nouns.

Definite articles can occur before a noun(the apple) or before and adjective + noun(the green apple).

Definite articles do not have to be repeated when nouns are combined with and  
COUNT NOUNS:

SINGULAR: THE + SINGULAR COUNT NOUN- the banana/the apple
PLURAL: THE+PLURAL COUNT NOUN-the bananas/the apples

NONCOUNT NOUNS: 

THE+NONCOUNT NOUNS: the fruit

Practice
http://www.myenglishpages.com/site_php_files/grammar-exercise-articles.phphttp://www.myenglishpages.com/site_php_files/grammar-exercise-articles.php 
http://www.agendaweb.org/grammar/articles-definite-indefinite-exercises.html