受身形 => Passive voice N4
[時「とき」] => At the time A N5
Time
~V使役受身      => causative-passive form N4
Conjugate verbs
と同時に => at the same time as; while; simultaneously ~ N2
Vた[時「とき」] => After having done something N5
Time
[受「う」]け[身「み」] => Passive, be V-ed. N4
Causative, Passive, Volitional
[使「し」][役「えき」][受「う」]け[身「み」] => Imperative N4
Causative, Passive, Volitional