Here is a list of the subject pronouns you can use in inversion. Note how je (I) is not among them! You pretty much never invert je and the verb (unless you’re a writer of melodramas in the 19th century).
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tu (you [singular informal])
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il/elle/on (he/she/one)
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nous (we)
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vous (you [singular formal or plural formal and informal])
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ils/elles (they [masculine or mixed/feminine])
Statement: Tu veux une glace. (You want an ice cream.)
Question with inversion: Veux-tu une glace? (Do you want an ice cream?)
Statement: Vous parlez italien. (You speak Italian.)
Question with inversion: Parlez-vous italien? (Do you speak Italian?)
Inversion with verbs that end in a vowel in the third person
When you invert the subjects il (he), elle (she), or on (one) and a verb that ends in a vowel when conjugated in the present or future tense, pronunciation requires that you add -t- between the verb and subject inverted.This rule applies to the third person singular of -er verbs and the third person singular of aller (to go) in the present tense, and to the third person singular form in future tense. Here are a few examples of such forms:
Aime-t-elle la glace? (Does she like ice cream?)
Parle-t-on anglais ici? (Does one speak English here?)
Dinera-t-il avec nous? (Will he have dinner with us?)
Inversion with a noun or a name as the subject
Inversion cannot be done when the subject is a noun (like la fille, which means the girl) or a name (like Julie). It can only be done between a subject pronoun and the verb. Here’s how you get around that problem: You simply add the subject pronoun to the sentence while the noun or name sits at the beginning of the sentence. Here’s how to proceed.-
Leave the original noun subject at the beginning.
For example, in La petite fille veut un vélo (The little girl wants a bicycle), leave La petite fille alone.
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Find the subject pronoun that matches the noun.
In this instance, you use elle (she) for La petite fille.
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Do inversion between the subject pronoun and the verb (be sure to add a hyphen) and add the question mark.
In this example, inversion produces veut-elle. And here’s your question: La petite fille veut-elle un vélo?
Statement: Marie joue du violon. (Marie plays the violin.)
Question with inversion: Marie joue-t-elle du violon? (Does Marie play the violin?)
Statement: Ce fruit est bon. (This fruit is good.)
Question with inversion: Ce fruit est-il bon? (Is this fruit good?)
Statement: Le match finira tard. (The match will end late.)
Question with inversion: Le match finira-t-il tard? (Will the match end late?)