Convaincre belong to the 3
rd group. Convaincre is a very common french verb.
Convaincre is conjugated the same way that verbs that end in :
-cre
Convaincre is conjugated with
auxiliary avoir.
Convaincre verb is
direct transitive.
French verb convaincre can be conjugated in the reflexive form:
Se convaincre
Convaincre verb is a direct transitive verb, so passive voice can be used.