French phrase
Si je comprends bien, vous demandez si ~ ?
Meaning
If I understand correctly, are you asking whether ___?
When to use it
A polite way to confirm someone's intended meaning. Common in consultations and inquiries.
Example dialogue
Si je comprends bien, vous demandez si vous pouvez vous inscrire à ce cours ?
If I understand correctly, are you asking whether you can enroll in this course?
Oui, j'aimerais m'inscrire.
Yes, I'd like to enroll.