An adverb, just like an adjective, is a modifier. It modifies a verb, an adjective or another adverb.

Examples:

Verb:

Benjamin Franklin single-handedly promoted his theory on electricity.

Adjective:

Franklin undertook the experiment, though it was extremely difficult.

Adverb:

Very carefully, he pursued his theory that led to the discovery of the lightning rod.

An adverb answers the questions how? when? where? and how often?.

Examples:

How?

People destined for greatness work hard.

When?

Do your task today.

Where?

The songs of the Beatles are popular everywhere.

How often?

It is said that Shakespeare wrote a literary piece daily.

An adverb that modifies a verb can come before or after the verb. It can also be written between the words in a verb phrase.

Examples:

Before:

Today our band will perform.

After:

Our band will perform today.

Between:

Our band has never performed unprepared.

However, when an adverb modifies an adjective or another adverb, it should come before the word it modifies.

Examples:

Adjective:

Nadia Comaneci was definitely magnificent at the uneven bars in the 1976 Olympics.

Adverb:

She performed exceptionally well at the balance beam.