1. to learn to ask questions using quand (when)
2. to learn various ways of asking questions (formal or informal)
A2 - niveau usuel (elementary)
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.