Look at these examples of aller in the Conditionnel Passé:
Je serais allé en Australie si j'avais eu les moyens.
I would have gone to Australia if I could have afforded it.
Tu y serais allée toi-même?
Would you have gone (there) yourself?
Serait-elle déjà partie?
Would she have left already?
Nous serions arrivés plus tôt s'il n'y avait pas eu d'embouteillage.
We would have arrived earlier if there hadn't been a traffic jam.
Seriez-vous partis si je vous l'avais demandé?
Would you have left if I had asked you?
Apparemment, ils seraient partis ce matin.
Apparently, they would have left this morning.
Selon Tom, elles seraient rentrées chez elles vers 3h.
According to Tom, they apparently went home (lit.would have come home) around 3.
Notice that être is used - not avoir.
Just as with the Passé Composé, some verbs (mostly movement verbs) conjugate with être in the Conditionnel Passé:
je serais, tu serais, il serait, nous serions, vous seriez, ils seraient (Conditionnel) + allé (or other past participle)
Note also that the past participle allé changes if the person doing the action is feminine (allée) or masculine, and singular or plural (allés/allées).
See other lessons on Le Conditionnel Passé:
Conjugate regular -er, -ir, -dre verbs (+ avoir) in Le Conditionnel Passé (past conditional)
Conjugate verbs with irregular past participles in Le Conditionnel Passé (past conditional)
Conjugate devoir in Le Conditionnel Passé = should have (past conditional)
Conjugate pouvoir in Le Conditionnel Passé = could have (past conditional)
Learn more about these related French grammar topics
Examples and resources
Apparemment, ils seraient partis ce matin.
Apparently, they would have left this morning.
Selon Tom, elles seraient rentrées chez elles vers 3h.
According to Tom, they apparently went home (lit.would have come home) around 3.
Tu y serais allée toi-même?
Would you have gone (there) yourself?
Elle serait allée les voir si elle avait eu le temps.
She would have gone to see them if she had had the time.
Serait-elle déjà partie?
Would she have left already?
Nous serions arrivés plus tôt s'il n'y avait pas eu d'embouteillage.
We would have arrived earlier if there hadn't been a traffic jam.
Seriez-vous partis si je vous l'avais demandé?
Would you have left if I had asked you?
Je serais allé en Australie si j'avais eu les moyens.
I would have gone to Australia if I could have afforded it.
aller
partir
sortir
Q&A
Jim
Kwiziq community member
9/02/17
Michael
Kwiziq community member
30/04/19
Adding to what Jim said:
The futur anterieur uses the future of the auxiliary and is a sort of a "future perfect" - ie. will have left/gone/eaten. - so Ils seront partis ce matin là, or elles seront rentrées chez elles, or je serai arrivé...
The conditionnel passé refers to something in the past which might or might not have occurred - ie. would have left/gone/eaten.
Aurélie
Kwiziq language super star
5/12/16
may
Kwiziq community member
11 February 2019
1 reply
être
Do these sentences only use être because they are using DRMRSVANDERTRAMP verbs?
Cécile
Kwiziq language super star
12 February 2019
12/02/19
Hi May,
Yes, that is one way they are taught at school to remember which verbs take 'être' (rather than 'avoir') when conjugating certain tenses...
And if it works for you, carry on using it ....