PREPOSITION

       A word which is placed before a noun or pronoun to bring relation with another noun
       or pronoun is called preposition.

    1) A Cow is resting under the tree.  

              Example: - Cow = Noun, Under = Preposition,
              Tree = Noun   

   
              2) The books is on the table.

             Example: - Books = Noun, On = Preposition, 
             Table = Noun

Mostly use prepositions are:

        Across, Along, Among, At, Above, Below, Between, Behind, Beside, Besides, By, During, In, On, Of, Over, Into, onto, Up, Upon, To, Towards, Through, With, Since etc.

CONJUNCTION

            If join two words with phrase, clause and sentence is called conjunction.

Example:-

1) He worked hard and got success.

            Example:- And = Conjunction

2) She worked hard but failed.

             Example:- But = Conjunction

3) Raju and rani went to a movie.

             Example:- And = Conjunction

4) He may be either in the library or in the staff.

             Example:- Either, in the library = conjunction,  or in the staff = phrase

5) If you help me now I will help you in future.

            Example:- If = Conjunction

INTERJECTION

 It expresses a sudden and strong feeling of surprises or shock.

Vow! What a beautiful flower.

Bravo! Well done.

Alas! India has lost the match.

Ouch! It pains.

Oops! I spoil the decoration.