French textbooks teach a fairly formal, written-leaning version of the language, which is a reasonable place to start but leaves a gap once you’re actually listening to native speakers. Conversational French regularly drops words, reorders sentences, and swaps in casual substitutes that never show up on the page. None of this is “incorrect”: it’s simply a different register, and recognizing it is essential for real listening comprehension. This post covers the most consistent differences between how French is written and how it’s actually spoken by native speakers.
Asking Questions: Four Approaches, Four Registers
This is the clearest, most systematic difference between spoken and written French. There are four ways to turn a statement into a yes/no question, and each one belongs to a specific register.
- Rising intonation (informal spoken only): keep the word order of a statement and simply raise your pitch at the end. Tu as quelque chose à dire ? (“Do you have something to say?”) This is extremely common in conversation but essentially never appears in writing, aside from quoted dialogue.
- Est-ce que (all registers): place est-ce que at the front of the statement. Est-ce que tu as quelque chose à dire ? This is the safest, most neutral option, usable in both spoken and written French at any formality level.
- Inversion (formal spoken and written): swap the subject pronoun and verb. As-tu quelque chose à dire ? This is standard in writing and formal speech, but sounds stiff if used constantly in casual conversation.
The same pattern holds for information questions (who, what, where, and so on). Here’s an example in the passé composé with a direct object pronoun.
In writing, the question word moves to the front along with inversion:
Où l’avez-vous vu ? (“Where did you see it?”)
In very informal spoken French, the question word can simply stay at the end of the sentence, with no inversion at all:
Vous l’avez vu où ? (“You saw it where?”)
Or move to the front without triggering inversion, which is common in casual speech but would look wrong on the page:
Où vous l’avez vu ? (“Where you saw it?”)
The Exception: Que
One exception: que (“what”) cannot be used this way. For example, a formally written sentence like:
Qu’est-ce qu’elle a dit ? or Qu’a-t-elle dit ? (“What did she say?”).
Does not become something like:
Qu’elle a dit ? (Incorrect)
In its place, informal speech uses the stressed form quoi, kept at the end of the sentence:
Elle a dit quoi ? (“She said what?”)
Dropping the Ne in Negation
Written French always uses the full two-part negation: ne before the verb, pas (or another negative word) after it. Spoken French routinely drops the ne and keeps only the second half, since the meaning still comes through clearly.
Written: Je ne sais pas.
Spoken: Je sais pas. (“I don’t know.”)
This shows up constantly with common expressions too.
Je n’en sais rien (“I don’t know anything about it”) becomes J’en sais rien in casual speech;
Ça ne vaut pas la peine (“It’s not worth it”) becomes Ça vaut pas la peine.
Dropping the ne is technically nonstandard grammar, but it’s so widespread in everyday spoken French that it would sound unusually formal to include it in every sentence when talking with friends.
In writing, or in any formal spoken context, keep the full ne… pas construction.
On Instead of Nous
Written and formal French use nous for “we.” In informal spoken French, on very frequently takes over that role instead, even though its literal meaning is closer to the impersonal “one” or “people.”
On y va ? (“Shall we go?”)
Pourquoi on rentre pas à la maison ? (“Why aren’t we going home?”)
Note that even though on is grammatically third-person singular (the verb always conjugates as il/elle would), any adjective describing the group it refers to is often pluralized in practice:
On est tous très fatigués (“We’re all very tired”).
Some teachers prefer the strict masculine singular agreement, so treat this as a spoken-register habit rather than a fixed rule.
Written French has its own small quirk in the other direction: after a word ending in a vowel, like et, ou, qui, or si, formal writing sometimes uses l’on instead of plain on, purely for smoother sound.
Comment savoir si l’on ne demande pas ? (“How can you know if you don’t ask?”)
This is a written-French habit; you won’t hear l’on much in conversation.
What These Spoken French Sentence Structures Mean in Practice
None of these spoken forms are wrong. They’re simply tied to register, the same way “gonna” and “going to” both work in English but aren’t interchangeable in every context. A few guidelines:
- For essays, emails to someone you don’t know well, or any formal writing, keep the full ne… pas, use nous, and lean on est-ce que or inversion for questions.
- For conversation with friends, dropping the ne, using on, and asking questions with plain intonation will sound natural, not sloppy.
- Est-ce que is the safest all-purpose choice for questions if you’re ever unsure which register a conversation calls for.
Next Steps
These register differences pair closely with the small talk habits covered in our post on French conversation fillers, since words like alors, ben, and donc are themselves markers of spoken register. For more of the idiomatic, everyday language that doesn’t show up in formal writing, see our guide to French idiomatic expressions.
Reading about register differences only goes so far: the fastest way to internalize when to drop the ne or swap in on is hearing it modeled by a native speaker and getting corrected in real time. A platform like italki lets you have that live conversation practice, which is exactly where these register distinctions start to feel automatic instead of like a rule you’re consciously applying.
