Correcting Passé Composé Errors — I can correct a common passé composé error in a supported task.

The passé composé is the most common past tense in modern French, yet its two-part structure has been a source of confusion for centuries — even among native speakers. Understanding how this tense evolved helps explain why certain errors are so persistent. The passé composé literally means "compound past," reminding us that it is built from two pieces: a helping verb (also called an auxiliary) and a past participle. The interaction between these two pieces creates most of the errors you will learn to correct.

So why do these errors keep happening? The answer is that the passé composé asks you to make several decisions at once: which auxiliary to use, how to form the participle, and whether agreement is needed. Each decision is a potential pitfall. This lesson will equip you to recognize, diagnose, and correct the most common of these errors with confidence.

Before you can fix errors, you need a solid understanding of how the passé composé is supposed to work. Think of it as a machine with moving parts — if any single part is out of place, the whole sentence breaks. The following four principles are the foundation for everything in this lesson.

The diagram below shows a decision flowchart you can use every time you need to check — or correct — a passé composé sentence. Start at the top and follow each decision point. If you answer "no" at any step, that step reveals the error you need to fix.

Notice how the flowchart moves from the broadest check (is there even a two-part verb?) to the most specific (does the participle agree with the subject?). This mirrors the strategy expert writers use when proofreading French: fix the obvious structural problems first, then zoom in on the finer details of agreement.

The Formula

Regular Past Participle Endings

Agreement with Être

Understanding these building blocks means you can diagnose almost any passé composé error. When you see a sentence that looks off, ask yourself three questions in order: Is there an auxiliary? Is it the right one? Does the participle look right and agree when it should? This systematic approach will make error correction feel much less random.

Now that you understand the mechanics, let's look at the specific errors that appear most often in student writing. The diagram below classifies these errors visually, and the table that follows provides examples with corrections.

Let's walk through a complete error-correction task step by step. Imagine you receive the following sentence and are asked to find and fix the error.

Choosing between avoir and être is the single biggest source of passé composé errors. The table below lays out the key differences and the common traps students fall into with each auxiliary.

The error-correction skills you are building now will serve you well as you advance in French. In French 3 and beyond, you will encounter more complex past-tense constructions that build directly on the passé composé. Understanding where errors come from today makes those future tenses far easier to learn.

The key insight is that French compound tenses all share the same architecture: auxiliary + participle. Once you master error correction in the passé composé, you are essentially training your eye for every compound tense you will ever learn. The plus-que-parfait, the futur antérieur, and even the conditionnel passé all follow the same pattern. Think of this lesson as an investment that pays off throughout your entire French career.

Test your error-correction skills with the following five problems. Each sentence contains one error. Identify the error, explain what is wrong, and write the corrected sentence.