Asphyxier belong to the 1
st group.
Asphyxier is conjugated the same way that verbs that end in :
-ier
Asphyxier is conjugated with
auxiliary avoir.
Asphyxier verb is
direct transitive, intransitive.
French verb asphyxier can be conjugated in the reflexive form:
S'asphyxier
Asphyxier verb is a direct transitive verb, so passive voice can be used.