Here are examples of how an adverb modifies a verb:
• - Ahmad eats quickly. (How does Ahmad eat?)
  
• - Sameer runs fast.(How does Sameer run?)
  
• - He always skips class. (What does he do?)

Here are examples of how an adverb modifies an adjective:
• He is very smart.
  
• He is really nice.

Here are examples of how an adverb modifies another adverb:
• - Ahmad eats very
quickly.

• - He did his work very well.

• Many adverbs end in -ly. We form such adverbs by adding -ly to the adjective.
• 
  For example:
  Quick becomes quickly , sudden becomes suddenly, intelligent becomes intelligently.
  
  

  But not all words that end in -ly are adverbs. "Friendly",
  For example, is an adjective.

• To form an adverb from adjectives ending in -y change the y to i before adding the -ly.
• 
  For example:
  angry becomes angrily , busy becomes busily
  
  
• To form an adverb from adjectives that end in -e drop the -e before adding the -ly.
• 
  For example:
  true becomes truly .
  
  
• Some adjectives that end in -ly need no changes.
• 
  For example:
  heavenly
  
  However, there are exceptions.
  For example:
  shy becomes shyly.
  
  

  Some adverbs have no particular form,
  For example:

  well, fast, very, never, always, often, hard, straight still.

There are three main positions in a sentence for an adverb:

• Before the subject:
  - Luckily we got there in time .
  - Now we leave work.
• Between the subject and the main verb:
  - We always study English.
• At the end of the sentence:
  - We study adverbs carefully.
• After the verb "be":
  - He is always ready to do his work.