comparison

2. the fastestfaster thanfast
the slowestslower thanslow
the oldestolder thanold
the easiesteasier thaneasy
the earliestearlier thanearly
the safestsafer thansafe
the rudestruder thanrude
the bestbetter thangood
the worstworse thanbad

3. the most expensivemore expensive thanexpensive
the most excitingmore exciting thanexciting
the most boringmore boring thanboring
the most popularmore popular thanpopular
the most dangerousmore dangerous thandangerous
the most difficultmore difficult thandifficult

5. He is as tall as a giraffe.
She is as beautiful as a flower.

7. Skydiving is the most dangerous sport.