An adverb, on the other hand, modifies a verb, an adjective, or another adverb. Adverbs often have an “-ly” at the end, as in “happily” and “heartily.” ... Such adverbs are usually formed by adding “-ly” to the end of an adjective, as we just did with the adjectives “happy” and “hearty.”

Is there an adverb that doesn't end in ly?

In English grammar, a flat adverb, bare adverb, or simple adverb is an adverb that has the same form as the corresponding adjective, so it usually does not end in -ly, e.g. "drive slow", "drive fast", but sometimes does, e.g. "drive friendly".

Should an adverb end in ly?

Typically, adverbs end in -ly though there are a few adjectives that take this ending too, such as lovely, friendly, lonely. Adverbs can be used to modify an adjective or an entire sentence. When modifying an adjective, the adverb immediately precedes it: particularly hot weather, recently re-elected president.