Inversion sujet-verbe
Inverting the subject and verb (Pouvez-vous? instead of Vous pouvez?) is the marker of careful, formal, or literary French. In casual speech you almost never invert — you'd ask Tu viens? or Est-ce que tu viens?, not Viens-tu? But in writing, in news, in literature, in formal speech, and in a few specific spoken contexts, inversion is the rule. There are four main places it shows up: (1) interrogative sentences (Pouvez-vous m'aider?), (2) dialogue tags in narration (dit-il, demanda-t-elle), (3) after certain adverbs at the start of a sentence (Peut-être, Sans doute, Aussi, À peine), and (4) in literary subordinate clauses as a stylistic choice. At B2/C1 you need to recognize all four and produce the first three when the register calls for it.
Interrogative inversion — the formal question
To form a yes/no question by inversion, swap the subject pronoun and the conjugated verb, joining them with a hyphen. Vous pouvez → Pouvez-vous? Tu viens → Viens-tu? Il sait → Sait-il? With a third-person singular verb ending in a vowel (a, e), insert a euphonic -t- between hyphens: Il a → A-t-il? Elle parle → Parle-t-elle? On va → Va-t-on? This -t- has no meaning — it's purely there to break the vowel hiatus. With je, inversion is rare and old-fashioned (puis-je? = may I, fixed expression; suis-je? is grammatical but stiff). For wh-questions: Quand partez-vous? = When are you leaving? Pourquoi a-t-il refusé? = Why did he refuse? Comment ça va-t-il? = How is it going? In casual speech, you'd use Vous partez quand? or Quand est-ce que vous partez? instead — inversion is the formal/written option.
Inversion with a noun subject — keep both
When the subject is a noun rather than a pronoun, you can't just invert — you need a double subject structure. Keep the noun in subject position and add an inverted resumptive pronoun after the verb. Marie pourra-t-elle venir? = Will Marie be able to come? Le ministre a-t-il répondu? = Did the minister answer? Vos parents sont-ils d'accord? = Are your parents in agreement? The pronoun matches the noun in gender and number: il/elle/ils/elles. This 'noun + verb-pronoun' inversion is one of the most marked features of formal written French. In spoken French you'd just say Est-ce que Marie peut venir? or Marie peut venir? with rising intonation.
Inversion in dialogue tags — dit-il, demanda-t-elle
After reported speech in narration, French inverts the subject and the verb of saying. This is how dialogue is written in essentially every novel, news article, and short story. — Je viens, dit-il. = 'I'm coming,' he said. — Pourquoi? demanda-t-elle. = 'Why?' she asked. — Bonjour! s'écria Marie. = 'Hello!' Marie cried. The inversion happens whether or not the dialogue ends in a question mark. Common dialogue verbs that take this inversion: dit-il / dit-elle (he/she said), demanda-t-il (he asked), répondit-il (he replied), s'exclama-t-elle (she exclaimed), murmura-t-il (he murmured), ajouta-t-il (he added), reprit-il (he resumed). With a noun subject: — Je sais, dit Marie. = 'I know,' said Marie. (No resumptive pronoun in this case — just the noun after the verb.)
Inversion after sentence-initial adverbs
Certain adverbs, when placed at the start of the sentence, trigger inversion of the next clause's subject and verb. The most common: peut-être (perhaps), sans doute (probably / no doubt), aussi (so / therefore — only in this initial-position meaning), à peine (hardly / barely), encore (still / however), du moins / tout au moins (at least), ainsi (thus), toujours est-il que (the fact remains that). Examples: Peut-être viendra-t-il demain. = Perhaps he will come tomorrow. Sans doute a-t-elle raison. = She's probably right. Aussi a-t-il décidé de partir. = And so he decided to leave. À peine était-il arrivé qu'il repartit. = He had hardly arrived before he left again. Ainsi parla Zarathoustra. = Thus spoke Zarathustra. (Famous Nietzsche translation.) Crucially, aussi at the start of a clause means 'so / therefore', NOT 'also' — for 'also' you say aussi AFTER the verb (il vient aussi) or également (il vient également). To avoid the inversion in casual speech, just put the adverb later in the sentence or use Peut-être qu'il viendra demain. (with que + normal order).
Inversion in literary subordinate clauses
In literary writing, the subject and verb of a relative or other subordinate clause are sometimes inverted for rhythm and elegance, especially when the subject is heavy or the verb is short. Tel était le plan que proposa Marie. = Such was the plan that Marie proposed. (Compare normal order: ... que Marie proposa.) Voici la lettre qu'écrivit le roi. = Here is the letter that the king wrote. C'est une histoire que raconte ma grand-mère. = It's a story that my grandmother tells. The trigger is usually that the subject (Marie, le roi, ma grand-mère) is informationally heavier than the verb. This is purely a stylistic choice — never required, never wrong without it. You'll see it constantly in literary prose, occasionally in formal essays, almost never in conversation. As a B2 reader, the key is recognizing it when you see it: proposa Marie is just Marie proposa, no meaning change.
When NOT to invert — keep the natural order
Several common contexts that look like they might trigger inversion don't. (a) Inverted indirect questions are wrong: Je me demande s'il viendra, NOT Je me demande viendra-t-il. The subordinate clause stays in normal order. (b) After que introducing a clause, no inversion: Je sais que Marie vient, NOT Je sais que vient Marie (in everyday writing). The literary inversion described above is OPTIONAL and stylistic; the default is normal order. (c) After most adverbs that aren't on the special list. Heureusement, il est venu — no inversion (compare: Peut-être est-il venu with inversion). (d) In casual yes/no questions, just rising intonation or est-ce que: Tu viens? or Est-ce que tu viens? are far more common than Viens-tu? in everyday speech.
Quick recap
(1) Interrogative inversion: Pouvez-vous?, A-t-il? (with euphonic -t- before vowel). Formal/written. (2) Noun + resumptive pronoun: Marie pourra-t-elle venir? (3) Dialogue tags: dit-il, demanda-t-elle, répondit Marie. (4) After certain initial adverbs: peut-être, sans doute, aussi (= so/therefore), à peine, ainsi. (5) Literary subordinate clauses: Tel était le plan que proposa Marie — recognize, don't force. (6) Don't invert in indirect questions or after most adverbs. (7) In casual speech, replace inversion with est-ce que or rising intonation.
