（１）John is taller than Bill.
（２）Mary is older than Mike.
（３）John runs faster than she.
（４）This book is more difficult than that.
（５）John speaks more carefully than his father.
（６）He is the tallest in his class.
（７）Mary is the youngest of the four girls.
（８）This is the most beautiful painting in this museum.
（９）John is the most famous of these people.