The degrees of comparison are:
1.positive degree (The Positive degree denotes the mere existence of quality) :
e.g. Michael is a tall boy. Anne is beautiful.
2.comparative degree (The Comparative degree is used to compare 2 persons or things having the same quality) :
e.g. David is taller than Michael. Caroline is more beautiful than Anne.
3.superlative degree (The Superlative degree is used when more than 2 persons or things are compared.It is singles one from all the rest) :
e.g Nicholas is the tallest boy from the class. Mary is the most beautiful girl from the class.