Adjectives which are gradable are used to compare people, things, groups of people, or a set of another with another. When adjectives are gradable, it means they are compared according to their degrees and values. There are three degrees of comparison of adjective. 

a.    Positive: This is used for a person, thing, a group of people or a set of things. It is the simple and based form of the adjectives. Example: good, hard, difficult.

b.    Comparative: It is used to compare two people, things, ideas, two groups of people, two sets of ideas. etc.Example: better, harder, more difficult.

c.    Superlative: It is used to compare three or more people, things, dears, groups of people, sets of things etc. Examples: best, hardest, most difficult.

1.    The inflexion method: It is the addition of ER and EST to form the comparative and superlative.

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