Noun

      Noun is a word which names a person, a place or a thing.
For example  chair, table, book, New York, computer, cup, boy, John, hospital, Newton,  garden, room, man, Paris, doctor, and pen are nouns because each of these words is a name of a person, a place or a thing.
Examples.
Chair, table, book, cup, computer, picture,  (names of things)
New York, Paris, Canada, Toronto, school, hospital, cinema, garden, (names of places)
John, Newton, R.H Stephen, Einstein, man, boy, doctor (names of persons)

Types of Noun

There are two main types of noun.

• Common Noun
• Proper Noun

Common Noun.
  Name of a common or a non-specific thing, place, or person is called common noun.

Common noun refers to a non-specific or non-particular thing, place or person.
For example book, pen, room, garden man, girl, road, camera, month, day, chair, school, boy, car, are common nouns because each of these nouns refers to a common thing, place or person.
Proper Noun.
 Name of a particular or a specific thing, place or person is called proper Noun.

For example BMW Car, April, Monday, Oxford University, New York, America, John, Newton, Einstein, R.H Stephen, are proper nouns because each of these nouns refers to a particular thing, place or person.

If a common noun is specified it becomes a proper noun. For example day is a common noun but if it is specified like Monday or Friday, it becomes proper noun. Similarly car is a common noun but if it is specified like BMW Car, it becomes proper noun.

Use of CAPITAL LETTER for proper noun.       

      
The first letter of proper noun is always written in capital letter.

Examples.
         He lives in Paris.
         She studies in Oxford University.
         Author of this book is John Stephen.
         Laws of motion were presented by Newton
         The richest person of the world is Bill Gates.

Use of “THE” for proper noun. 

The article “the” is used before some proper nouns. Here are some rules for the use of article “the” before proper nouns.

• Article “the” is not used before the name of countries, cities, for example New York, America, Mexico, Canada, Toronto, London, Paris, America. But if the name of country or city or place expresses group of places or lands or states, then article “the” will be used before it. For example, the Philippines, the Netherlands, the United States
• Article “the” is not used before the name of universities, for example Oxford University, Yale University, or Columbia University. But if the name of university is written in a order that it includes the word “of” then article “the” will be used before it, for example, the University of British Colombia, the university of Oxford, the University of Toronto.
• Article “the” is used before names composed of both common noun and proper noun, for example the New York city, the Dominion of Canada, the River Nile
• “The” is used before the names of laws, principles, theories or devices, for example, the Pythagorean Theorem, the Fahrenheit Scale, the Law of Newton, the Allais effect. But if the proper noun is used in possessive form, no article will be used, for example Newton’s Laws of Motion, Hooke’s Law of Elasticity, Dalton’s Law of Partial Pressures.
  
• “The” is used before the names of buildings, hotels, libraries having particular names, for example the Brunel Hotel, the Lahore Museum, the Library of Congress,
• “The” is used before the name of a geographical region and points on globe, for example the Middle East, the West, the Equator, the North Pole
• “The” is usually used before the names of organizations for example, the Association of Chartered Accountants,  the World Health Organization,

Countable and Uncountable Nouns

Countable Nouns.
  A noun which can be counted is called countable noun.
For example, "book" is countable noun because we can count it and can say one book, two books, three books and so on. Pen, chair, cup, room, man, baby, bottle, dog, cat are examples countable nouns. A countable noun can be singular as well as plural. Article “a” or “an” is used before singular noun but not before plural noun. If a singular noun starts with consonant letter then “a” is used before it, i.e. a book, a cat, a pen. If a singular noun starts with............................