Degrees Of Comparison Questions
The rules for forming comparatives and superlatives of adjectives ending in -ful are as follows:
1. For adjectives with one syllable, add -er to form the comparative and -est to form the superlative. For example: careful (comparative: more careful, superlative: most careful).
2. For adjectives with two or more syllables, use more before the adjective to form the comparative and most before the adjective to form the superlative. For example: beautiful (comparative: more beautiful, superlative: most beautiful).
Note: Some adjectives ending in -ful may not follow these rules and have irregular comparative and superlative forms.