Adverbs of manner

Some adverbs tell us how an action is or should be performed.

Often these adverbs are formed by adding -ly to the end of an adjective.

Adjectives ending -l add -ly ; careful-carefully.

Adjectives ending -y change to -ily ; lucky-luckily

Adjectives ending -ble change to -bly ; responsible-responsibly

For example:

The little girl ran quickly. In this sentence quickly modifies the verb ran (to run).