Although we could probably do without this similarity with English, Latin, too, has not only regular, but also irregular adjectives:
- bonus - good, melior/melius - better (irregular in Latin and English)
- malus - bad, pejus/pejor - worse (irregular in Latin and English)
- magnus - great, major/majus - greater
- parvus - small,little, minor/minus -less (irregular in Latin and English)
- multus - much, many, plures - more (irregular in Latin and English)
- If the noun is neuter, so is the adjective.
- If the noun is plural, so is the adjective.
- If the noun is in one case, so is the adjective.
In the comparative, you don't have to worry about whether the noun is masculine or feminine, just whether or not it's neuter. That's because the endings on comparative adjectives don't follow the 1st and 2nd declensions. Instead, comparative adjectives follow the 3rd declension, with the following exceptions exceptions
- no -i, but an -e for the ablative singular,
- an -a instead of -ia for the neuter plural nominative/accusative, and
- a similar lack of /i/ for the neuter plural.
- nom. masc/fem. longior
- gen. masc/fem. longioris
- dat. masc/fem. longiori
- acc. masc/fem. longiorem
- abl. masc/fem. longiore
- nom. neut. longius
- gen. neut. longioris
- dat. neut. longiori
- acc. neut. longius
- abl. neut. longiore
- nom. masc/fem. longiores
- gen. masc/fem. longiorum
- dat. masc/fem. longioribus
- acc. masc/fem. longiores
- abl. masc/fem. longioribus
- nom. neut. longiora
- gen. neut. longiorum
- dat. neut. longioribus
- acc. neut. longiora
- abl. neut. longioribus