You ask a question in French by making your voice go up at the end of the sentence, by using est-ce que, by changing normal word order, or by using a question word. When you put the verb in front of the subject, you join the two words with a hyphen. A -t- is used in the il/elle form if the verb ends in a vowel.
Answer
There are 3 main ways to ask a question in French: • Formal: (question word quand, où, etc) + verb + subject + ? ...
• Neutral: (question word) + est-ce que + subject + verb + ? Est-ce que vous connaissez Victor Hugo ? ...
• More informal: subject + verb (+ question word) + ? Elle travaille chez vous ?
J'espère que cela t'aides!!