Goal
You’ll be able to form the passé composé using avoir, the auxiliary verb used by the large majority of French verbs, and understand what “auxiliary verb” actually means in this construction.
Learn
The passé composé is French’s primary tense for describing a completed past action — genuinely similar in role to Spanish’s preterite or English’s simple past, but structurally different: it’s built from an auxiliary (helping) verb plus a past participle, not a single conjugated word.
Most French verbs use avoir (covered in Part 1.4) as this auxiliary:
j'ai parlé (I spoke / I have spoken) tu as fini (you finished) elle a vendu (she sold)
Past participles follow genuinely predictable patterns by verb family: -er verbs → -é (parlé), -ir verbs → -i (fini), -re verbs → -u (vendu).
The genuinely important structural point: avoir is conjugated normally to match the subject (j’ai, tu as, elle a), while the past participle stays the same regardless of subject — j’ai parlé and nous avons parlé both use parlé unchanged; only the auxiliary avoir portion actually conjugates.
Decision Task
You want to say “we spoke” using passé composé with parler. Before reading on: does the past participle parlé change to match “nous,” or does only the auxiliary verb change?
Show Answer
Only the auxiliary changes — nous avons parlé. Avons (the conjugated form of avoir for “nous”) changes to match the subject, but parlé itself stays exactly the same regardless of which subject is speaking.
Common Mistake
Attempting to conjugate the past participle itself to match the subject, rather than understanding that only the auxiliary verb (avoir) actually conjugates. The past participle (parlé, fini, vendu) stays fixed and unchanged across every subject in this construction, with avoir doing all the actual subject-matching work.
Practice Questions
1. Form the passé composé of parler for “je”.
Show Answer
j’ai parlé
2. Form the passé composé of finir for “elle”.
Show Answer
elle a fini
3. Form the passé composé of vendre for “nous”.
Show Answer
nous avons vendu
4. Form the passé composé of aimer (to like) for “tu”.
Show Answer
tu as aimé
5. Does the past participle itself change to match the subject, or only the auxiliary verb?
Show Answer
Only the auxiliary verb (avoir) changes; the past participle stays the same.
Try It Yourself
Without looking back, form the passé composé of finir for “ils” (they), using the correct auxiliary conjugation and past participle ending.
Show Answer
ils ont fini — ont is the “ils” form of avoir, and fini is the unchanged -ir past participle.
Quick Check
1. What is the passé composé built from?
Show Answer
An auxiliary verb plus a past participle.
2. What auxiliary verb does most French verbs use?
Show Answer
avoir
3. What ending does an -er verb’s past participle take?
Show Answer
-é
4. What ending does an -ir verb’s past participle take?
Show Answer
-i
5. What ending does an -re verb’s past participle take?
Show Answer
-u