FCE / B2 First Word Formation Practice Exam 2025 – Comprehensive Guide to Mastering Your Certification!

The adverb form of "quick" is "quickly," which is formed by taking the adjective "quick" and adding the suffix "-ly." This transformation is a common way to create adverbs in English, as the suffix "-ly" indicates how something is done, often relating back to the manner or degree of an action. By using "quickly," you can describe an action that is performed in a swift manner, which directly aligns with the meaning of the original adjective.

In contrast, "quickness" is a noun that represents the quality of being quick, while "quickened" is the past tense of the verb "to quicken," meaning to make something faster. "Quicker" is a comparative form of the adjective "quick," used to compare the speed of two or more subjects. Each of these forms serves a distinct grammatical purpose, but they do not function as adverbs in this context.