Examples are blue, happy, big, and beautiful. An adverb is a describing word. It describes a verb, another adverb, or an adjective. Adverbs answer the how, where, when, and to what extent questions. Many adverbs end with -ly.
Examples are happily, slowly, loudly, and soon.
Punctuation marks help make the meanings of sentences clear. The period is used at the end of a declarative sentence and a command. Mother baked chocolate chip cookies. Go to your room. A period is used at the end of an abbreviation.