Page 165 - Easy Japanese - Learn to Speak Japanese Quickly! (TUTTLE)

Ru-Verbs
For the verbs in this group, replace ru with nai.
tabemasu → taberu → tabenai not eat

Irregular Verbs
The members of this group have the following negative forms.

kimasu → kuru → konai not come
shimasu → suru → shinai not do
arimasu → aru → nai not exist

ikimasu → iku → ikanai not go

Special Polite Verbs
The stem of the verbs in this group actually end in r, although it disappears in
the masu form. This is why these five verbs are separated from U-verbs.
irasshaimasu → irasshari → irassharu there is

gozaimasu → gozari → gozaru there is

kudasaimasu → kudasari → kudasaru please give me
nasaimasu → nasari → nasaru please do
ossahaimasu → osshari → ossharu please say

To make the negative form, follow the rule for U-verbs: change u to anai.
irasshaimasu → irassharu → irassharanai there is not

gozaimasu → gozaru → gozaranai there is not
kudasaimasu → kudasaru → kudasaranai please do not
give me

nasaimasu → nasaru → nasaranai please do not
do

ossahaimasu → ossharu → ossaharanai please do not
say

Remember that adjectives and nouns have two alternative Formal negative
forms. Similarly, desu can follow the Informal negative verb form to form the
alternative Formal negative forms.

Adjective: Takaku nai desu. Takaku It is not