Adverbs are mostly derived from adjectives by changing the ending to -im.

Verbs are different from adjectives, though, because they cannot be modified by very, more, or most.

In English, adverbs are usually distinguished from adjectives by the ending -ly.

And, as in English, many common adverbs are not derived from adjectives at all:

The result is startling/shocking/amazing/disturbing (chose from these or other adjectives).

Its most common usage is to derive adverbs from adjectives, just as in English:

These may also be used to derive verbs from nouns and adjectives.

In almost all cases, they do not differ from adjectives in form, but in function.

In French, as in English, most adverbs are derived from adjectives.

In this sector there is great difficulty distinguishing adverbs from adjectives.