Question

which sentence uses the superlative form correctly?
a. the expression on my fathers face was the most grim i had ever seen.
b. sheila kellar is considered by many to be the haughtiest girl in school.
c. the book on quantum physics is most dull than the book on sports.
d. julius, my younger brother, is the most tall student in the ninth grade.

Explanation:

• Option A: "Grim" is a one - syllable adjective. The superlative form of one - syllable adjectives is usually formed by adding "-est" (grimmest), not "most + adjective". So this is incorrect.
• Option B: "Haughty" is a three - syllable adjective. For adjectives with three or more syllables, the superlative is formed by "most + adjective". But "haughtiest" is the correct superlative form (it is a two - syllable adjective with a "y" at the end. When forming the superlative, we change "y" to "i" and add "-est"). This sentence uses the superlative form correctly.
• Option C: "Dull" is a one - syllable adjective. When comparing two things (the book on quantum physics and the book on sports), we should use the comparative form. The comparative form of "dull" is "duller", not "most dull". So this is incorrect.
• Option D: "Tall" is a one - syllable adjective. The superlative form of "tall" is "tallest", not "most tall". So this is incorrect.

Answer:

B. Sheila Kellar is considered by many to be the haughtiest girl in school.