Amplifier belong to the 1st group.
Amplifier is conjugated the same way that verbs that end in : -ier
Amplifier is conjugated with auxiliary avoir.
Amplifier verb is
direct transitive.
French verb amplifier can be conjugated in the reflexive form: S'amplifier Amplifier verb is a direct transitive verb, so passive voice can be used.
However, although the terminations are perfectly regular, stem can be irregular and have numerous variations.
Amplifier is conjugated the same way that verbs that end in : -ier.
AMPLIFIER : v. tr. Rendre ample. Amplifier une nouvelle. Il amplifie toujours les choses. Il amplifie tout ce qu'il dit. Absolument, Il amplifie toujours. En termes d'Optique, il signifie Grossir, en parlant des verres, des lunettes.