People in general and students in particular dislike learning Grammar rules, more so specially, English Grammar rules. However, we should understand that Grammar has a crucial function in a language. Without grammatical rules, we will not be able to learn a foreign language like English. Hence, English Grammar plays a very important role in helping us enhance our proficiency. Whether it is in speaking or writing English, we should aim at 100% grammatical correctness. There is no compromise in this aspect. However, mastering mere rules will not help in improving proficiency levels. One should know how to use language in different contexts. For this, constant practice is required.

Several mistakes are committed by Indian students while using English. These mistakes have become so common that even highly educated people commit them in their daily social interactions. It is better to know about the correct grammatical usage of the eight parts of speech in English so as to avoid common errors.

Firstly, we shall learn about the usage of Nouns, which are the most essential words. A Noun may also be called a ‘naming word’ because it is defined as the name of a person, place or thing. Nouns are classified into two types: Concrete Nouns and Abstract Nouns.
Look at these words: Srikanth , chair, sugar, army, silver.

These are names of persons or things that we can see and touch. Such nouns are called Concrete Nouns since they exist physically or materially.

Look at these words: beauty, youth , enjoyment ,  knowledge , astrology.

These are the names of things that we can only think of, but can neither touch nor see. They do not have any physical existence and can express a quality (e.g. patience), a state (e.g. death), a feeling (e.g. pleasure) or an action (e.g. flight).These  nouns are called Abstract Nouns.

Concrete Nouns are further divided into four groups.

Proper Nouns: Names of particular persons, places or things. e.g. Ravi(boy), London(place), Colgate (toothpaste).They begin with a capital letter.
Common Nouns: Names that can be applied to any one of a class of persons, places or things. e.g. girl,  flower, sheep.
Collective Nouns: Names of groups of persons or things of the same kind, which can be considered as a single whole. E.g.  flock,  team, crowd.
Material Nouns: Names of materials or substances out of which things are made. e.g. wood, glass, gold.
Without going much into the details of rules, we shall now look into the correct usage of some Nouns which are often wrongly used.

CORRECT USE OF SOME COMMONLY USED NOUNS
1.WRONG: I bought a book for the Suresh. RIGHT:  I bought a book for Suresh.
2.WRONG: The sceneries in Kashmir are beautiful.
RIGHT: The scenery in Kashmir is beautiful.
3.WRONG: Let me give you some advices.
RIGHT: Let me give you some advice. (or) Let me give you a piece of advice.
4.WRONG:I bought furnitures from that shop.
RIGHT: I bought furniture from that shop.
5.WRONG: The book contains informations  about a wide variety of subjects.
RIGHT: The book contains information about
a wide variety of subjects.
6.WRONG: The machineries are imported from
London.
RIGHT: The machinery is imported from London.
7.WRONG: The hotel’s name was embossed
on the stationeries.
RIGHT:  The hotel’s name was embossed on the stationery. 
8.WRONG: His pant is in the wash.
RIGHT: His pants are in the wash.
9.WRONG: The scissor is sharp.
RIGHT: The scissors are sharp.
10.WRONG: She bought three dozens oranges.
RIGHT: She bought three dozen oranges.
11.WRONG: The equipments of the hospital
was expensive.
RIGHT: The
equipment of the hospital was expensive. 
12.WRONG: The gold is a costly metal.
RIGHT: Gold is a costly metal.
13.WRONG: My spectacle is broken.
RIGHT: My spectacles are broken.
14.WRONG: Measles are  a communicable disease.
RIGHT: Measles is a communicable disease. 15.WRONG: She loves the poetries of Keats.
RIGHT: She loves the poetry of Keats. (or)
She loves the poems of Keats.