Adverb Form

We make many adverbs by adding -ly to an adjective, for example:

There are some basic rules about spelling for -ly adverbs. See the table below:

adjective ending do this adjective adverb
most adjectives add -ly quick
nice
sole
careful
quickly
nicely
solely
carefully
-able or -ible change -e to -y regrettable
horrible
regrettably
horribly
-y change -y to -ily happy happily
-ic change -ic to -ically economic economically

But not all words that end in -ly are adverbs. The following -ly words, for example, are all adjectives:

And some adverbs have no particular form. Look at these examples:

Note that the form of an adverb can also change to make it comparative or superlative.