Ralentir belong to the 2
nd group. Ralentir is a common french verb.
Ralentir is conjugated the same way that verbs that end in :
-ir
Ralentir is conjugated with
auxiliary avoir.
Ralentir verb is
direct transitive, intransitive.
French verb ralentir can be conjugated in the reflexive form:
Se ralentir
Ralentir verb is a direct transitive verb, so passive voice can be used.