When the superlative adjective consists of:

For example: Fast - Faster - Fattest
Big - Bigger - Biggest
For example:
Beautiful - more beautiful - most beautiful
Uncountable - more uncountable - most uncountable
For example: Happy - Happier - Happiest
Tidy - Tidier - tidiest
Again, there are irregular forms of adjectives. The table below shows the most frequently used forms of irregular adjectives.
| Good | Better | Best |
| Bad | Worse | Worst |
| Little (amount) | Less | Least |
| Little (Size) | Smaller | Smallest |
| Much (Uncountable) | More | Most |
| Many (Countable) | More | Most |