I am listening to the song Maître Gims – Est-ce que tu m'aimes.
In the chorus, there is a part that goes
Est-ce que je t'aime ?
J'sais pas si je t'aime
Est-ce que tu m'aimes ?
J'sais pas si je t'aime
But I do not hear him say “sais” in the line “J'sais pas si je t'aime”. It just sounds like “j'ai pas si je t'aime” — there is no “s” sound. I know that many sounds are dropped in French. Is there some rule about being able to drop that sound?
You can find one instance at 1:04. Great song too.