What are 3 ways to ask a question in french?

for example :

Is your skirt blue ?

- Est-ce que ta jupe est bleue ?
Est-ce que + sentence affirmative + ? You add "est-ce que to the non interrogative sentence. This is commonly used but less "correct" than the one below

-Ta jupe est-elle bleue ?
subject + verb + pronoun + adj.+ ? this one is the most correct . Inversion

-Ta  jupe est bleue ?
sentence affirmative + ? you just change the intonation

hope I helped !