Understanding Adjective Degrees of Comparison

Adjectives are words that describe nouns. They can change their form to show comparison between things. There are three degrees of comparison:

• Positive Degree: Used when describing a single thing or when comparing things that are equal. (e.g., big, happy, beautiful)
• Comparative Degree: Used when comparing two things. (e.g., bigger, happier, more beautiful)
• Superlative Degree: Used when comparing one thing to a group of three or more things to show which one has the highest or lowest degree of the quality. (e.g., biggest, happiest, most beautiful)

Analyzing the Sentence and the Comparison Needed

The given sentence is: "The clock that we have in our town square is a big in the whole town".

The sentence is comparing the clock in the town square to all other things (implicitly other clocks or structures) in the entire town. This means we are comparing one item (the clock) to a group of many items (everything else in the town).

This type of comparison requires the use of the superlative degree of the adjective.

Evaluating the Underlined Segment and Options

The underlined segment is "a big". "Big" is the positive degree of the adjective, and "a" is an indefinite article. Using the positive degree here is incorrect because a comparison to a group is being made.

Let's examine the given options:

• 1. the bigger: "Bigger" is the comparative degree, used for comparing only two items. This does not fit the context of comparing the clock to everything in the whole town.
• 2. the big: "Big" is the positive degree. This is used for simple description or equal comparison, not for comparing one item to a group as the largest.
• 3. the biggest: "Biggest" is the superlative degree of "big". This is used for comparing one item to a group of three or more and indicating which is at the extreme end of the quality. The definite article "the" correctly precedes the superlative adjective here. This fits the context of describing the clock as having the highest degree of "bigness" among everything in the town.
• 4. a biggest: "Biggest" is the superlative degree. However, superlative adjectives are typically preceded by the definite article "the", not the indefinite article "a". This option is grammatically incorrect.

Selecting the Most Appropriate Substitution

Based on the analysis of the required degree of comparison and the correct usage of articles with superlative adjectives, the most appropriate option to substitute "a big" is "the biggest".

The corrected sentence should be: "The clock that we have in our town square is the biggest in the whole town".

Summary Table: Degrees of "Big"

Revision Table: Adjective Comparison Forms

Additional Information on Superlative Adjectives

Superlative adjectives are crucial for indicating the highest or lowest degree of a quality within a set of items.

• Always use "the" before a superlative adjective when it modifies a noun, unless a possessive pronoun or noun in the possessive case is used (e.g., my biggest fear, John's best friend).
• Sometimes, the group being compared to is understood from the context and not explicitly stated (as in the given sentence, "in the whole town" specifies the group).
• Formation of superlatives: add "-est" to most one-syllable adjectives (e.g., small > smallest), use "most" for most adjectives with two or more syllables (e.g., expensive > most expensive), and remember irregular forms (e.g., good > best, bad > worst, far > farthest/furthest).