Renforcer belong to the 1
st group. Renforcer is a common french verb.
Renforcer is conjugated the same way that verbs that end in :
-cer
Renforcer is conjugated with
auxiliary avoir.
Renforcer verb is
direct transitive.
French verb renforcer can be conjugated in the reflexive form:
Se renforcer
Renforcer verb is a direct transitive verb, so passive voice can be used.