Forms of Adverb

 The forms of some related verbs are exactly the same as the noun adjectives.

Therefore, some words are sometimes used as related verbs and sometimes as adjective nouns.

For example:

• He spoke in a loud voice.    (Adjective)
• Don't talk so loud.      (Adverb)
• Waseem Akram is our fast bowler.  (Adjective)
• Waseem Akram can bowl fast.     (Adverb)
• He lives in the next house.    (Adjective)
• When I next see him, I shall speak to him.   (Adverb)

NOTE:

(i) Some forms of adverbs have two forms.

A form that ends in "ly" and the second one is exactly like an adjective.

For Example:

• She sings very loudly.
• She sings very loud.

(ii) But sometimes these two forms of relative verbs have different meanings. 

For Example:

• Stand near (as opposed to distant)
• Daud works hard (diligently)
• I could hardly (scarcely) recognize him. 

(iii) Some adverbs are used as nouns after a preposition.

For Example:

• He came from there. ( that place)
• I have heard that before now. ( this time)

(iv) Noun that shows the relationship with the verb related to time, place, distance, weight, price, rank, etc. or exactly like the related verb. 

Such nouns are used as adverbs.

For Example:

• We walked five miles
• He went home.

In these examples home, miles etc. is a noun which is used as a related verb.

(v) Sometimes adverbs are used in place of a verb.

For Example:

• Smack went the whip.