Adverb is a word that modifies a verb, an adjective, another adverb, or a sentence, ex., "happily", "very", or "frankly"
* I want it badly.
* She was really pleased.
* He is extremely clever.
* She sings beautifully.
* Adverbs are formed by adding -ly to an adjective. Ex: slow (adj) - slowly (adverb)
* Many adverbs are gradable. Ex: "very softly", "extremely slowly"
* Some adverbs can take comparative and superlative forms, with -er or more and -est or most. Ex. Mary works harder. John works hardest.
* As a sentence constituent, an adverb or any group of words that can substitute for an adverb is an adverb phrase.
* An adverbial is a word or phrase that functions as an adverb would, modifying verbs, adjectives, adverbs, or the whole sentence.
* An adverbial clause is usually introduced by a subordinating conjunction.
* An adverbial complement is an adverbial word or phrase that completes the meaning of an intransitive verb.
* An adverbial modifier are words that add information about how, when, where, why, or how much something happens.