Adverbs of manner are usually formed from adjectives by adding –ly:
bad > badly; quiet > quietly; sudden > suddenly
but there are sometimes changes in spelling:
easy > easily; gentle > gently
If an adjective ends in –ly we use the phrase in a …. way to express manner:
Silly > He behaved in a silly way.
Friendly > She spoke in a friendly way.
A few adverbs of manner have the same form as the adjective:
They all worked hard. She usually arrives late. I hate driving fast.
