Most of these type of adverbs come from Adjectives:
Adjective Adverb
He is a careful driver He drives carefully
Adjective+ly
Bad - Badly
Easy - Easily
Silly - He jogs in a silly way Friendly - He speaks in a friendly way
Irregular
Good - Well I did my job well
Hard - He works hard
Late - The program started late -He comes late
Fast - She did the dinner so fast
