Auxilary verbs modify the verb, by indicating tense, negation, indicating immediacy, and/or indicating certainty of an action. Auxilary verbs come immediatly before the verb.
(Negation Prefix-)(Immediacy Prefix-)(Modal Prefix-)(tense)(-certainty suffix) verb (negation article)
Indicated by preceding the verb with the auxilary verb zel for future, jas for past.
To negate a verb prefix the auxilary verb (if any) with za- and place the 'article' kal after the verb.
To indicate immediate or near future or past (ie. about to do, or just did, an action, add the prefix ke-
Modal prefixes indicate whether the actor can or has to do the action:
To modify the certainty of a future event or the desire that a past event had occurred.