How do you say must have
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Neil J.Kwiziq community member
How do you say must have
As in that must have been terrible for you
This question relates to:French lesson "Conjugate devoir in the conditional past in French = should have (Le Conditionnel Passé)"
Asked 7 years ago
![](/files/shared/_avatar-mids/user/68907/Ron%204x6%20photo_5927b14442f20.jpg)
Ron T. Kwiziq Q&A super contributor
One way to say «must have» is «il doit avoir». there are other constructions, however.
![](/files/shared/_avatar-mids/user/68907/Ron%204x6%20photo_5927b14442f20.jpg)
Ron T. Kwiziq Q&A super contributor
In fact, here is another construction «Cela a dû être terrible pour vous»
![](/files/shared/_avatar-mids/user/23/aurelie-foliage_57f251f5d2e24.png)
AurélieKwiziq team member
Bonjour Neil !
To express "must have + past participle" as in "must have done"..., you will use Le Passé Composé of "devoir" = "a dû + infinitive"
"Ça a dû coûter cher." (It must have cost a lot)
"Il a dû se sentir mal à l'aise. (He must have felt uneasy.)
See:
https://progress.lawlessfrench.com/revision/grammar/conjugate-voir-boire-croire-savoir-lire-taire-avoir-in-le-passe-compose-conversational-past
I hope that's helpful!
À bientôt !
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