Por: Carola Pozo Cortez
1) Many adverbs in English are formed by adding - ly - to the corresponding adjective.
fast - fastly
beautiful - beautifuly
quick - quickly
2) However, there are, many special adverbs with no corresponding adjective forms: soon, here, there, often, seldom, ever, never, etc.
3) Some words, like fast, hard, late, early, etc., may be used both as adjectives or as adverbs without any change of form.
He is a fast walker.
He walks fast
He is a hard worker.
He works hard.