1. to learn to ask questions using quand (when)
2. to learn various ways of asking questions (formal or informal)
To form a question starting with quand, you can: use the inversion method (verb+subject) OR use est-ce que after the question word.
These are the most common structures.
In a question using the inversion method, the letter t is required in front of elle(s), il(s) or on when the verb ends with a vowel. This is to avoid a break, making the sentence sounds better.
que becomes qu' in front of a vowel or an h.
Another way to ask a question is to simply change the intonation of your voice, making it rise towards the end of the sentence. This is an informal way of asking questions.
▹ When does the show start?
▸ Quand commence le spectacle ?
▸ Quand est-ce que le spectacle commence ?
▸ Il commence quand, le spectacle ? (informal)
▸ Le spectacle, il commence quand ? (informal)
▸ Le spectacle commence quand ? (informal)
▹ When is she arriving at the station?
▸ Quand arrive-t-elle à la gare ?
▸ Quand est-ce qu'elle arrive à la gare ?
▸ Elle arrive quand à la gare ? (informal)
▹ When did she arrive at the station?
▸ Quand est-elle arrivée à la gare ?
▸ Quand est-ce qu'elle est arrivée à la gare ?
▸ Elle est arrivée quand à la gare ? (informal)