How to Say I Don't Understand in French

You're standing at a boulangerie counter, the baker rattles off a sentence at full speed, and your brain goes blank. Knowing how to say "I don't understand" in French is the single most useful survival phrase you can learn, and the good news is that there are several polite ways to do it.

Why This Phrase Matters More Than You Think

Most beginners freeze, nod, and hope for the best, which is how you end up agreeing to something you never meant to. Saying clearly that you didn't follow, and asking for help, signals that you're trying, and French speakers tend to respond warmly to that effort.

The trick is having more than one tool. "I don't understand" can mean you missed a word, the speaker talked too fast, or the whole sentence was a mystery. Each situation has its own natural phrase, and this post gives you all of them.

The Basic Phrase: Je ne comprends pas

The standard way to say "I don't understand" in French is Je ne comprends pas (I don't understand). It's polite, clear, and works everywhere, from a train station to a business meeting.

Key Phrases

• Je ne comprends pas (zhuh nuh kohm-prahn pah) — I don't understand
• Je n'ai pas compris (zhuh nay pah kohm-pree) — I didn't understand (just now)
• Je ne comprends pas bien (zhuh nuh kohm-prahn pah bee-ahn) — I don't understand well
• Pardon ? (par-dohn) — Sorry? / Pardon?
• Comment ? (koh-mahn) — What? / How's that?

[AUDIO: Je ne comprends pas]

Grammar Note

Comprendre (to understand) is an irregular verb that follows the same pattern as prendre (to take). In the present tense it goes like this:

• je comprends
• tu comprends
• il/elle comprend
• nous comprenons
• vous comprenez
• ils/elles comprennent

Negation wraps around the verb: ne before it and pas after it. In fast speech, many French people drop the ne and just say Je comprends pas, but keep it in writing and in polite situations.

• Common mistake: forgetting the second half of the negation and saying Je ne comprends alone, which sounds incomplete.
• Common mistake: using Je ne sais pas (I don't know) when you mean you didn't follow what was said.

French people will often say Pardon ? when they haven't heard something, and it's considered perfectly polite. A flat Quoi ? (what?), by contrast, sounds blunt, so save it for friends.

Asking Someone to Repeat or Slow Down

Saying you don't understand is only half the job. The real help comes from asking for what you need next. These phrases are the ones you'll use most.

Key Phrases

• Pouvez-vous répéter, s'il vous plaît ? (poo-vay voo ray-pay-tay seel voo play) — Can you repeat that, please?
• Pouvez-vous parler plus lentement ? (poo-vay voo par-lay ploo lahn-tuh-mahn) — Can you speak more slowly?
• Parlez plus doucement, s'il vous plaît. (par-lay ploo doos-mahn) — Speak more softly/gently, please.
• Qu'est-ce que ça veut dire ? (kes-kuh sah vuh deer) — What does that mean?
• Comment dit-on ... en français ? (koh-mahn dee-tohn ... ahn frahn-say) — How do you say ... in French?

Notice the vous form in the first two. With a stranger, a shopkeeper, or anyone older, vous is the safe and respectful choice. With a friend, switch to tu and say Tu peux répéter ? (can you repeat?) or Tu peux parler plus lentement ?

In France, a little humility goes a long way. Opening with Excusez-moi, je suis désolé, mon français n'est pas très bon (excuse me, I'm sorry, my French isn't very good) often makes people slow down and even switch to simple vocabulary without being asked.

Saying How Much You Understand

Sometimes you understand part of what was said. French has nice phrases for this, and they help the other person adjust.

• Je comprends un peu. (zhuh kohm-prahn uhn puh) — I understand a little.
• Je comprends, mais je ne parle pas bien. (may zhuh nuh parl pah bee-ahn) — I understand, but I don't speak well.
• Je n'ai pas tout compris. (zhuh nay pah too kohm-pree) — I didn't understand everything.
• Je suis débutant(e). (zhuh swee day-bü-tahn/tahnt) — I'm a beginner.

That last one is handy because it adds a gender detail. Men say débutant and women say débutante, though they sound almost the same in speech.

Grammar Note

Notice the difference between je ne comprends pas (present: I don't understand, right now) and je n'ai pas compris (past: I didn't understand what you just said). When someone has just finished a sentence, the second one is more natural, because you're talking about something that already happened a moment ago. It uses the passé composé: avoir plus the past participle compris.

Putting It to Use: A Real Conversation

Here's how the phrases work together in a short exchange at a train station. Read it out loud, and try swapping in your own words.

• Employé: Le prochain train pour Lyon part du quai huit à quatorze heures trente.
• Vous: Excusez-moi, je n'ai pas compris. Pouvez-vous répéter, s'il vous plaît ?
• Employé: Bien sûr. Quai huit, quatorze heures trente.
• Vous: Pardon, quatorze heures trente, c'est quelle heure ?
• Employé: Deux heures et demie de l'après-midi.
• Vous: Ah, d'accord, merci beaucoup !

Notice how the traveler doesn't give up. They ask for a repeat, then ask a targeted question about the one confusing part (the 24-hour clock). Targeted questions are far easier for the other person to answer than a vague "I don't understand."

Practice Exercises

• Translate into French: "I don't understand."
• Fill in the blank: Pouvez-vous ___ plus lentement, s'il vous plaît ? (parler, parlez, parlé)
• Translate into French: "I didn't understand everything."
• Choose the polite option for speaking to a stranger: "Tu peux répéter ?" or "Pouvez-vous répéter ?"
• Fill in the blank: Nous ___ (comprendre) un peu le français.
• Translate into English: "Qu'est-ce que ça veut dire ?"

Answer Key

• Je ne comprends pas.
• parler (after "pouvez-vous" the verb stays in the infinitive).
• Je n'ai pas tout compris.
• Pouvez-vous répéter ? (the vous form is more polite with strangers).
• comprenons (nous comprenons un peu le français).
• What does that mean?

Conclusion

Next time French comes at you faster than you can follow, you'll know exactly what to do. Stay calm, say so politely, and ask for what you need.

• Je ne comprends pas is the all-purpose phrase, and Je n'ai pas compris is the natural choice right after a sentence.
• Pair it with a request: Pouvez-vous répéter ? or Pouvez-vous parler plus lentement ?
• Use vous with strangers and tu with friends, and ask targeted questions about the part you missed.

Ready to keep going? Try the Exercises section to practice these phrases in context, then browse our other "how to say" guides, and leave a comment with the situation where you most need this phrase.