Adverbs modify verbs. They tell you How something is done.
Example: How does he she sing? - She sings beautifully.
Rule: Adverbs are often formed by adding -ly to an adjective
Example: beautiful - beautifully, careful - carefully
* Some adjectives don't change in the adverb form. The most important of these are: fast - fast, hard - hard
* Good is probably the most important exception. The adverb form of 'good' is 'well'. Unfortunately, this is a common mistake that many Americans make!
NOT!!: He plays tennis good.
Rule: Adverbs can also modify an adjective. In this case, the adverb is placed before the adjective.
Example: She is extremely happy. They are absolutely sure.
* Do not use 'very' with adjectives that express an increased quality of a basic adjective Example: good - fantastic
NOT!!: She is a very beautiful woman.
Rule: Adverbs of frequency (always, never, sometimes, often, etc.) usually come before the main verb
Example: He is often late for class. Do you always eat in a restaurant? They don't usually travel on Fridays.
* Adverbs of frequency expressing infrequency are not usually used in the negative or question form. NOT!!: Does she rarely eat fish? They don't seldom go to the cinema.
* Adverbs of frequency are often placed at the beginning of a sentence. Example: Sometimes, he likes to go to museums.
* Adverbs of frequency follow - come after - the verb 'to be'. Example: He is sometimes late for work.
Adverbs are used to modify a verb, an adjective, or another adverb:
 Mary sings beautifully
 David is extremely clever
 This car goes incredibly fast
In , the adverb beautifully tells us how Mary sings. In , extremely tells us the degree to which David is clever. Finally, in , the adverb incredibly tells us how fast the car goes.