Adverbs describe verbs, adjectives or other adverbs.
We must prepare this type of report weekly. (adverb)
She wakes up early. (adverb)
Adjectives describe nouns.
It is a very long story. (adjective)
Kate is a fast learner. (adjective)
Some adverbs and adjectives have the same form.
Come back soon.
the back door
|The train went fast.||a fast train|
|They worked hard.||The work is hard.|
Turn right here.
The right answer.
|He went straight home.||a straight line|
|She led us wrong.||This is the wrong way.|
|He looks friendly.|
He is a friendly person.
After such verbs as "be, feel, taste, smell, sound, look, appear, seem" we usually use an adjective (not an adverb).
You look beautiful!
That sounds great!
We also use adjectives speaking about the weather.
It is warm today.