French conjugation in past conditional

The past conditional or passé du subjonctif in french, is a compound tense, which means it has two parts:
  • the auxiliary verb in present conditional (either avoir or être)
  • the past participle of the main verb

Grammatical agreement

Like all French compound conjugations, the past conditional may be subject to grammatical agreement:
  • When the auxiliary verb is être, the past participle must agree with the subject, except for reflexive verbs (same rules as conjugation with auxiliary avoir) and invariable past participles.
  • When the auxiliary verb is avoir, the past participle must agree with its direct object when the direct object is placed before the verb.

Auxiliaries conjugation in present conditional

Here is the french conjugation of auxiliaries avoir and être in present conditional to compose past conditional.
Auxiliary Avoir
j' aurais
tu aurais
il / elle aurait
nous aurions
vous auriez
ils / elles auraient
Auxiliary Être
je serais
tu serais
il / elle serait
nous serions
vous seriez
ils / elles seraient