More expensive, the most expensive
larger, the largest
more cheerfull, the most cheerfull
more dangerous, the most dangerous
more talkative, the most talkative
prettier, the pretties
2.
It is the happiest day of my life.
hot
deeper
coldest
faster
cheapest
colder
longest
3.
better
the worst
more correct
tastiest
the fastest
4.
than
more, than
from
that
then
than