1) The most common class of adverbs ends in -e, and is derived from Decl. I/II Adjectival formation:Like I said, it's been 8 years, but this does sound right. Now you just need to fit the vocabulary to the rules (and I was never good with vocabulary).
Beside the Adjective bellus bella bellum "pretty" we have the Adv. belle "nicely, cutely"
...
Beside bona bonus bonum we would expect bone, but we get bene, the vowel phonetically shifted by use. But the basic rule stands: Adjectives in "-us -a, -um" make an adverb in -e, and this includes the "most" m or Superlative grade in -issimus -a -um, which make adverbs by the same rule: -issime. "most....-ly"
2) Adjectives which normally occur in our Class II Adjectives [e.g., fortis, brave] (like Class III nouns) regularly take the ending -ter, which makes an adverb just as well, and with no difference in meaning from the above.
So fortis "brave" gives fortiter "bravely". This class is common and pretty regular, no special problems
3) But if you want to make an adverb from [form?] a "more" (comparative) adjectival form, you don't use this -ter ending, but use instead the comparative neuter form [i.e., adjectival] just as it stands.
So from the grade normal adj. tristis "sad", you make the "more" comparative up as tristior "sadder or rather sad", and then the adverb will be the same as the neuter singular in -ius:
tristius "rather sadly, or more sadly".
On my business cards, I have ita erat quando hic adveni. (It was that way when I got here.)
posted by Specklet at 3:31 PM on August 26, 2005