If you learn only a handful of French survival phrases, make these two part of the emergency kit: je ne sais pas and je ne comprends pas. They are incredibly useful, wonderfully honest, and much better than smiling politely while your brain quietly leaves the building.
These phrases help when someone speaks too fast, asks a question you cannot answer, or launches into a glorious paragraph of French and you catch exactly one word: bonjour. It happens to everyone.
In this guide, you’ll learn how to say “I don’t know,” “I don’t understand,” and a bunch of related lifesavers in natural French, with pronunciation help, example sentences, and notes on when each phrase sounds polite, casual, or slightly blunt.
If you want more beginner-friendly French guides, you can also explore Learn French.
The Two Main Lifesaver Phrases
| French | Pronunciation | Meaning | Example Sentence | Translation | Learner Note |
|---|---|---|---|---|---|
| Je ne sais pas. | zhuh nuh say pah | I don’t know. | Je ne sais pas où est la gare. | I don’t know where the train station is. | The standard, neutral way to say “I don’t know.” In fast speech, people often say je sais pas. |
| Je ne comprends pas. | zhuh nuh kom-prahn pah | I don’t understand. | Je ne comprends pas cette question. | I don’t understand this question. | Very useful in class, travel, shops, and conversations. In casual speech, you’ll often hear je comprends pas. |
These are both built with French negation: ne…pas. In careful standard French, you include both parts. In everyday spoken French, the ne often disappears, especially in casual conversation. If you want a clear explanation of that pattern, see this guide to French negation.
Polite classroom French: Je ne sais pas. Real-life fast French: Je sais pas.
How To Pronounce Them Naturally
Je ne sais pas is often pronounced more like juh nuh say pah in slow speech, but in everyday conversation it can shrink into something closer to shay pah or j’sais pas. French loves swallowing little sounds when it talks quickly. Very efficient. Slightly rude to learners, but efficient.
Je ne comprends pas keeps more of its shape, but the final s in comprends is silent. You do not say it like English “comprehends.” The nasal sound in comprends is the trickiest part, so don’t panic if it takes practice.
For now, aim for clear and understandable rather than perfect. Being understood beats sounding like a dictionary recording on day one.
Useful Phrases You’ll Actually Need
| French | Pronunciation | Meaning | Example Sentence | Translation | Learner Note |
|---|---|---|---|---|---|
| Je ne sais pas. | zhuh nuh say pah | I don’t know. | Je ne sais pas combien ça coûte. | I don’t know how much it costs. | Neutral and useful everywhere. |
| Je sais pas. | zhuh say pah / shay pah | I don’t know. | Je sais pas, peut-être demain. | I don’t know, maybe tomorrow. | Casual spoken French. Fine with friends; less ideal in formal writing. |
| Je ne comprends pas. | zhuh nuh kom-prahn pah | I don’t understand. | Désolé, je ne comprends pas. | Sorry, I don’t understand. | Very common and polite enough in most situations. |
| Je comprends pas. | zhuh kom-prahn pah | I don’t understand. | Je comprends pas ce mot. | I don’t understand this word. | Casual spoken form. |
| Je n’ai pas compris. | zhuh nay pah kom-pree | I didn’t understand. | Pardon, je n’ai pas compris. | Sorry, I didn’t understand. | Great when someone has already said something and you missed it. |
| Je ne sais pas encore. | zhuh nuh say pah ahn-kor | I don’t know yet. | Je ne sais pas encore si je peux venir. | I don’t know yet if I can come. | Useful for plans and decisions. |
| Je ne sais plus. | zhuh nuh say plew | I don’t remember anymore / I no longer know. | Je ne sais plus son nom. | I don’t remember his name anymore. | Often means you once knew, but forgot. |
| Je ne suis pas sûr(e). | zhuh nuh swee pah sewr | I’m not sure. | Je ne suis pas sûr de la réponse. | I’m not sure about the answer. | Add e in writing if the speaker is feminine: sûre. |
| Je ne suis pas certain(e). | zhuh nuh swee pah sair-tan | I’m not certain. | Je ne suis pas certaine que ce soit correct. | I’m not certain that this is correct. | A bit more formal than pas sûr(e). |
| Je ne vois pas. | zhuh nuh vwah pah | I don’t see / I don’t get it. | Je ne vois pas la différence. | I don’t see the difference. | Can mean literally “I can’t see” or figuratively “I don’t understand.” |
| Je ne connais pas. | zhuh nuh koh-nay pah | I don’t know (a person/place/thing) | Je ne connais pas ce restaurant. | I don’t know that restaurant. | Use connaître for familiarity, not facts. Important difference. |
| Je ne le sais pas. | zhuh nuh luh say pah | I don’t know it / I don’t know that. | Je ne le sais pas exactement. | I don’t know that exactly. | Grammatically fine, but less common than plain je ne sais pas in many everyday situations. |
The Big Difference: Savoir Vs Connaître
English uses “know” for everything. French does not, because French likes making learners earn their coffee.
Use savoir when you mean knowing a fact, an answer, how to do something, or specific information.
- Je ne sais pas. = I don’t know.
- Je sais nager. = I know how to swim.
- Tu sais son adresse ? = Do you know his address?
Use connaître when you mean being familiar with a person, place, book, song, or thing.
- Je ne connais pas Marie. = I don’t know Marie.
- Je connais ce film. = I know that movie.
- Tu connais Paris ? = Do you know Paris?
| Pattern | Meaning | French Example | English Translation | Learner Note |
|---|---|---|---|---|
| savoir + information | to know a fact | Je ne sais pas la réponse. | I don’t know the answer. | About information or facts. |
| savoir + infinitive | to know how to do something | Je ne sais pas conduire. | I don’t know how to drive. | Very common pattern. |
| connaître + noun | to know/be familiar with | Je ne connais pas ce quartier. | I don’t know this neighborhood. | For people, places, works, and familiar things. |
So if you want to say “I don’t know that person,” say je ne connais pas cette personne, not je ne sais pas cette personne. That last one sounds wrong because it is wrong. French is not being mysterious there. It is just a different verb.
How To Ask People To Repeat Or Explain
Saying “I don’t understand” is good. Following it with a useful request is even better. Here are some polite ways to keep the conversation alive instead of letting it die a dramatic little death.
| French | Pronunciation | Meaning | Example Sentence | Translation | Learner Note |
|---|---|---|---|---|---|
| Vous pouvez répéter ? | voo poo-vay ray-pay-tay | Can you repeat? | Pardon, vous pouvez répéter ? | Sorry, can you repeat? | Polite and very useful. |
| Tu peux répéter ? | tew puh ray-pay-tay | Can you repeat? | Tu peux répéter, s’il te plaît ? | Can you repeat, please? | Use with friends, family, children, or informal situations. |
| Plus lentement, s’il vous plaît. | plew lon-tuh-mahn seel voo play | More slowly, please. | Vous pouvez parler plus lentement, s’il vous plaît ? | Can you speak more slowly, please? | Excellent travel and classroom phrase. |
| Qu’est-ce que ça veut dire ? | kess kuh sah vuh deer | What does that mean? | Qu’est-ce que “bavarder” veut dire ? | What does “bavarder” mean? | Very common. Notice the elision in qu’est-ce que. |
| Ça veut dire quoi ? | sah vuh deer kwah | What does that mean? | “Sur place”, ça veut dire quoi ? | What does “sur place” mean? | More conversational than the full form. |
| Comment ? | koh-mahn | Sorry?/What? | Comment ? Je n’ai pas entendu. | Sorry? I didn’t hear. | Common, but can sound abrupt depending on tone. |
| Pardon ? | par-dohn | Sorry?/Pardon? | Pardon ? Je n’ai pas compris. | Sorry? I didn’t understand. | Often softer and more polite than just comment ?. |
| Je peux le dire en anglais ? | zhuh puh luh deer ahn ahn-glay | Can I say it in English? | Désolé, je peux le dire en anglais ? | Sorry, can I say it in English? | Helpful bailout phrase. |
Polite Versions For Real Life
Sometimes the basic phrase is enough. Sometimes you want to soften it, especially with strangers, staff, teachers, or anyone you would rather not accidentally sound grumpy with.
- Désolé, je ne comprends pas. = Sorry, I don’t understand.
- Pardon, je n’ai pas compris. = Sorry, I didn’t understand.
- Je suis désolé, je ne sais pas. = I’m sorry, I don’t know.
- Excusez-moi, je ne comprends pas bien. = Excuse me, I don’t understand very well.
If you want more apology phrases and when to use them, this guide to saying sorry in French is a handy companion.
A Few Very Common Real-Life Sentences
| French | Pronunciation | Meaning | Example Sentence | Translation | Learner Note |
|---|---|---|---|---|---|
| Je ne sais pas où aller. | zhuh nuh say pah oo ah-lay | I don’t know where to go. | Sans GPS, je ne sais pas où aller. | Without GPS, I don’t know where to go. | Very useful while traveling. |
| Je ne sais pas quoi dire. | zhuh nuh say pah kwah deer | I don’t know what to say. | Je ne sais pas quoi dire après ça. | I don’t know what to say after that. | Natural and common. |
| Je ne sais pas comment faire. | zhuh nuh say pah koh-mahn fair | I don’t know how to do it. | Je ne sais pas comment faire la réservation. | I don’t know how to make the reservation. | Good for practical problems. |
| Je ne comprends pas la question. | zhuh nuh kom-prahn pah lah kes-tyohn | I don’t understand the question. | Excusez-moi, je ne comprends pas la question. | Excuse me, I don’t understand the question. | Useful in class and interviews. |
| Je ne comprends pas ce mot. | zhuh nuh kom-prahn pah suh moh | I don’t understand this word. | Je ne comprends pas ce mot en français. | I don’t understand this word in French. | Perfect for language learning. |
| Je n’entends pas bien. | zhuh non-tahn pah byan | I can’t hear well. | Pardon, je n’entends pas bien. | Sorry, I can’t hear well. | Useful if the issue is hearing, not understanding. |
| Je ne parle pas bien français. | zhuh nuh parl pah byan frahn-say | I don’t speak French well. | Désolé, je ne parle pas bien français. | Sorry, I don’t speak French well. | A useful honesty shield. |
| Je débute en français. | zhuh day-byoot ahn frahn-say | I’m a beginner in French. | Je débute en français, alors parlez lentement. | I’m a beginner in French, so speak slowly. | Sounds a bit more positive than apologizing constantly. |
Common Mistakes English Speakers Make
- Saying only “pas” without the verb.
Pas comprendre is not a full sentence in normal French. Say je ne comprends pas or casually je comprends pas. - Mixing up savoir and connaître.
Je ne sais pas Marie is wrong. Say je ne connais pas Marie. - Using direct English word order too literally.
“I don’t understand you” can be je ne vous comprends pas or je ne te comprends pas, depending on who you are talking to. - Forgetting register.
Je sais pas is normal in casual speech, but je ne sais pas is safer in polite situations, writing, class, and customer service. - Confusing not hearing with not understanding.
Use je n’entends pas if you did not hear. Use je ne comprends pas if you heard the words but did not understand them.
Mini Grammar Note: Why The Ne Disappears
Standard written French usually uses the full negative form: je ne sais pas, je ne comprends pas. In spoken French, especially informal speech, people often drop ne.
- Je ne sais pas. = standard, careful, neutral
- Je sais pas. = casual spoken French
- Je ne comprends pas. = standard, careful, neutral
- Je comprends pas. = casual spoken French
This does not mean the full version is old-fashioned. It is still the safest default for learners. Then, once your ear gets used to real conversations, the shorter versions will stop sounding like French swallowed half the sentence for fun.
Practice: Choose The Right Phrase
Try these quick situations. Pick the best French phrase.
- You missed what someone just said.
Best answer: Je n’ai pas compris. - You do not know the answer to a question.
Best answer: Je ne sais pas. - You know the words they said, but the meaning is unclear.
Best answer: Je ne comprends pas. - You are talking about a city you have never visited.
Best answer: Je ne connais pas cette ville. - You want someone to slow down.
Best answer: Plus lentement, s’il vous plaît.
Quick Reference Summary
| English | French | Best Use |
|---|---|---|
| I don’t know. | Je ne sais pas. | General neutral answer |
| I don’t know. (casual) | Je sais pas. | Informal speech |
| I don’t understand. | Je ne comprends pas. | General neutral answer |
| I didn’t understand. | Je n’ai pas compris. | Something was already said |
| I’m not sure. | Je ne suis pas sûr(e). | Softer, less direct response |
| I don’t know this person/place. | Je ne connais pas… | Use with people, places, things you are familiar with or not |
| Can you repeat? | Vous pouvez répéter ? | Polite conversation rescue |
| More slowly, please. | Plus lentement, s’il vous plaît. | When French is flying past at train speed |
Keep Practicing
If you want to see where your French currently sits, try the French placement test. If you want to check the words you already know, the French vocabulary test is a good next step.
And yes, if you came here specifically for the classic phrase, you can also jump straight to how to say I don’t know in French.
Yak Takeaway
If you remember only two lines from this whole lesson, make them je ne sais pas and je ne comprends pas. They are simple, polite, and wildly useful. Add vous pouvez répéter ? and plus lentement, s’il vous plaît, and suddenly you are not stuck anymore. You are not fluent yet, sure, but you are no longer just nodding at chaos. That is progress.
