I can't wait ... (long) than an hour.
longer
You're not very tall. Your brother is ... (tall)
taller
The building is very old. It's ... (old) in the town.
the oldest
Brazil is ... (big) country in South America.
the biggest
Everest is ... (high) mountain in the world.
the highest
London isn't very beautiful. Paris is ... (beautiful)
more beautiful
It's a very good film. It's ... (good) film I've ever seen.
the best
Britain isn't very big. France is ... (big).
bigger