Astreindre belong to the 3
rd group. Astreindre is a common french verb.
Astreindre is conjugated the same way that verbs that end in :
-ndre
Astreindre is conjugated with
auxiliary avoir.
Astreindre verb is
direct transitive.
French verb astreindre can be conjugated in the reflexive form:
S'astreindre
Astreindre verb is a direct transitive verb, so passive voice can be used.