Degrees of Comparison

There are three types of comparison degrees

1. positive degree

This type can be called as equality. It means, two objects have the same appearance, size, height, weight, etc.

The structures of the sentence are :

a. 1st object + tobe + as + adjective + as + 2nd object 

David is as tall as Jordan     
b. 1st object + tobe + no less + adjective + than + 2nd object
My brother is no less fat than my sister

2. Comparative Degree

This type is for comparing two objects which one of objects has higher level

The structures of the sentence are :

a. 1st object + tobe + adjective (+er/+ier) + than + 2nd object

This structure is for the adjectives which have one syllable (+er)  and two syllables with -y ended (+ier).

for example 

tall --> taller = "tall" has one syllable --> John is taller than me.

happy --> happier = "happy" has two syllables with -y ended --> you look happier than yesterday.

b. 1st object + tobe + more + adjective + than + 2nd project

this strucuture is for the adjectives which have more one syllable that ain't within -y ended. So, the adjectives don't need to be added  by -er or -ier suffixes.

for example

beautiful --> more beautiful = "beautiful" has three syllables --> Maudy Ayunda is more beautiful than Raisa

handsome --> more handsome = "handsome" has two syllables, but doesn't have -y ended. --> Ronny is more handsome than Gaga

3. Superlative

This type is for comparing one object of all. It means there is one object that has the highest level of all objects (there is no second object).

The structures of the sentence :

a. S + tobe + the + adjective (+est/+iest) 

This structure is for the adjectives which have one syllable (+est) and two syllables with -y ended (+iest).

for example

tall --> tallest = "tall" has one syllable --> Everest Mountain is the tallest in the world.

heavy --> heaviest = "heavy"  has two syllables with -y ended. --> This bag is the heaviest.

b. S + tobe + the + most + adjective 

this strucuture is for the adjectives which have more one syllable that ain't within -y ended. So, the adjectives don't need to be added by -er or -ier suffixes.

for example

expensive --> the most expensive = "expensive" has three syllables --> That cloth is the most expensive one I've ever bought

crowded --> the most crowded = "crowded" has two syllables, but doesn't have -y ended. --> Tokyo is the most crowded city.