Negative adverb (ne... pas encore)

Opening a new hotel is stressful, especially when there is still work to be done.

For the opening, the hotel must be spotless.
Pour l'ouverture, l'hôtel doit être impeccable.

To express that an action hasn't happened "yet," use the negative expression ne... pas encore.

"Not Yet" in the Passé Composé

In the passé composé, ne (or n') and pas encore surround the conjugated auxiliary verb (avoir or être). The past participle comes directly after.

The technician has not yet tested the air conditioning of the room.
Le technicien n'a pas encore testé la climatisation de la chambre.
They have not yet washed the sheets and the pillows.
Ils n'ont pas encore lavé les draps et les oreillers.

The exact same structure applies to verbs that take être as their auxiliary:

The new receptionist has not arrived yet.
Le nouveau réceptionniste n'est pas encore arrivé.

"Not Yet" in the Present Tense

You can also use ne... pas encore with present tense verbs to describe a current state. Just like standard negation, the expression simply wraps around the conjugated verb.

The hotel is not ready for the opening yet.
L'hôtel n'est pas encore prêt pour l'ouverture.