Here's why:
* Comparatives and Superlatives for Adjectives and Adverbs: We use comparative and superlative forms to indicate degrees of quality or quantity. For example, "big" becomes "bigger" and "biggest" to show increasing size. However, adverbs like "carefully" express a manner or degree of action.
* Alternatives for Expressing Degrees: To express different degrees of carefulness, we use other words or phrases:
* More carefully: This is the closest to a comparative form.
* Most carefully: This is the closest to a superlative form.
* With greater care: This emphasizes the level of care.
* With the utmost care: This emphasizes the highest level of care.
Example:
* Original: He walked carefully across the bridge.
* More carefully: He walked more carefully across the bridge than before.
* Most carefully: He walked most carefully when he was near the edge.