All adverbs in french are placed directly after the conjugated verb.

Pas toujours;
Exemple: Elle a bien testé son vélo.


Not always;
Example: She has to test his bike.


Adverbs that provide precision on the space-time are usually placed at the beginning or end of a sentence, often in the middle of the sentence.

EX: Hier elle est allée dans un magasin de vêtements.
Elle est allée dans un magasin de vêtements hier.
Elle est allée, hier, dans un magasin de vêtements.(rarely)


Yesterday she went into a clothing store.
She went into a clothing store yesterday.
She went yesterday in a clothing store.


Adverbs that complement a verb in the negative form are placed behind the second element of negation.
Ex : Elles n'y connaissent vraiment pas grand chose.
(Example: She did not really know much.)


Adverbs related to a verb in the infinitive are placed behind it.
Exemple : Le vendeur proposa de lui montrer tranquillement plusieurs modèles.
Example: The seller offered to quietly show several models.


Adverbs that relate to an adjective placed before them.
Exemple : Il y avait réellement beaucoup de choix.
(There was really a lot of choices.)