> Verb in {} (continuative form) +
means:
> "to be about to (verb)", "to be on the point of (verb)ing", etc.
The first verb used in this expression can be either in the active or passive voice form. Active or passive, Japanese verbs still inflect in the same manner.
**_Active voice_** : is the of
**** = "was about to kill"
**_Passive voice_** : is the of
**** = "was about to be killed"
The two 's cannot be separated as is just one verb.