Comparative adjectives are used to compare differences between the two objects they modify (larger, smaller, faster, higher). They are used in sentences where two nouns are compared, in this pattern:
Noun (subject) + verb + comparative adjective + than + noun (object).
The second item of comparison can be omitted if it is clear from the context (final example below).
My house is bigger than Riya’s.
Superlative adjectives are used to describe an object which is at the upper or lower limit of a quality (the tallest, the smallest, the fastest, the highest). They are used in sentences where a subject is compared to a group of objects.
Noun (subject) + verb + the + superlative adjective + noun (object).
The group that is being compared with can be omitted if it is clear from the context (final example below).
My car is the largest in the village.