Question

adjective:- 1)This is the (interesting)book i have ever read​

Answer 1

This is the most interesting book I have ever read.

• In this sentence, we need to use a form of the adjective given. Since the adjective is preceded by a definite article 'the', the superlative form is to be used.
• Adjectives can be of three degrees:

Positive, Comparative and Superlative

• Positive degree doesn't directly compare with anything.

Example: hard, good, pretty, etc.

• Comparative degree is used to compare between two entities or groups. It is used by adding a suffix 'er'.

Example: prettier, better, harder, etc.

• Superlative degree is the highest level of comparison and used by adding a suffix 'est'.

Example: best, prettiest, hardest, etc.