An Introduction to French Pronunciation

154 Intonation
20.6.2 Imperative sentences have a falling intonation, e.g.:
Entrez donc!
Regardez-le!
Ne fais pas ça. Goûtons ce vin!
Écris-moi demain.
This also applies to the so-called ‘3rd person imperative’ which
is expressed by a clause introduced by que and having its verb
in the subjunctive, e.g.:
Qu’il vienne me voir. Qu’ils s’en aillent.
20.6.3 In imperative sentences consisting of more than one
rhythmic group, the general trend of the intonational pattern
is a falling one throughout, but the final syllable of each group
except the last one is on a higher pitch, e.g. in:
Allez lui dire | de ne pas partir.
Asseyons-nous | un petit instant.
Expliquez-moi | ce qu’il faut faire.
Dites à votre frère | que je vais l’attendre.
the voice rises on dire, nous, moi and frère.