Adverbs formed from adjectives ending in -le
If the adjective ends in -le, drop the -e, and replace it with -y:
terrible – terribly
Adverbs formed from adjectives ending in -e
If the adjective ends in -e, then add -ly:
safe - safely
Not all words ending in -ly are adverbs:
There is no separate adverb for an adjective already ending in -ly.
Irregular forms
There are some irregular forms, where the adverb has a stem that differs from the adjective. Other irregular forms show no difference between the adjective and the adverb.
adjective | adverb |
good | well |
fast | fast |
hard | hard |