BBC Learning English - Adjectives and Adverbs

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Note that not all adverbs of manner which answer the question How…? end in -ly.
Most of them do, like this:
· How did they sleep? ~ They slept peacefully
· How well does she dance ~ She dances sublimely
But common exceptions include:
hard fast straight late
· He worked hard in order to pass the exam
· He was driving straight at me and I ran very fast to get out of his way.
· There was a power failure earlier today and the trains are all running late
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