[ruka]

Hi, The formaiton is the same as nai-from. For example, いく(iku) → いかない（ika nai）→ remove ない(nai) and add ずに(zu ni)　：いかずに(ika zu ni) . However, the ずに (zu ni) form for する （suru) verbs is not しずに（shi zu ni ) but せずに (se zu ni) , as in べんきょうせずに （benkyoo se zu ni) which means ' without studying'

Do you know how to make nai-form?
G1 verbs
e.g.　いく　→　いかない
　　　　 iku　→　ikanai
( 'u' sound change to 'a' sound and add 'nai')
　のむ（nomu）　→のまない（nomanai）

Ｇ２ verbs
e.g. たべる（taberu) →たべない(tabenai)
( remove ' る（ru）' and add ' ない（nai）' )
みる（miru) →　みない（minai)

G3 verbs
する（suru) →　しない（shinai)
くる（kuru) →　こない（konai)

AZ 50 Keys to Opening the New World of Japanese

Ｓｏｒｒｙ　Ｉ didn't see the second page when I wrote this.
The formation of ずに　has already explained before ....
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