[後「あと」]で => After V1, V2 N5
Time
[使「し」][役「えき」] => Coercive, permission, allow, make N4
Causative, Passive, Volitional
[使「し」][役「えき」][受「う」]け[身「み」] => Imperative N4
Causative, Passive, Volitional
たが[最後「さいご」] => Once A occurs, B happens N1
Information, Report