Model-3

Superlative - Ragu is one of the cleverest boys in the class. 

comparative- Ragu is cleverer  than most other boys in the class. 

positive       - Very few boys in the class are as clever as Ragu

Model-2

Superlative:    Gandhiji is the greatest leader in India.

Comparative: Gandhiji is greater than any other leaders in India. 

Positive:          No other leader in India is as great as Gandhiji 

Model: 4

1.Superlative: Madurai is not the biggest of all cities

2.Comparative: Madurai is not bigger than some other cities.

3.Positive: Some cities are at least as big as Madurai.( Pos)

Superlative: Raj is one of the poorest farmers in the village. 

Comparative: Raj is poorer than most other farmers in the village.

Positive: Very few farmers in the village are so poor as Raj.

Model:1

Superlative: London is the largest city in England

Comparative: London is larger than any other city in England.

Positive: No other city in England is so large as London