do you believe it?
Je ne suis pas aussi crédule que tu le crois.
I'm not as gullible as you think.
Tu ne me connais pas aussi bien que tu le crois.
You don't know me as well as you think you do.
Tu le crois, ça ?
Do you believe that?
Ne me dis pas que tu le crois.
Don't tell me you believe it.
Tu le crois, toi ?
Do you believe that?