would bet
Je ne parierais pas sur ça.
I wouldn't bet on it.
Je parierais ma vie là-dessus.
I would bet my life on it.
— Princess Bride (1987)
Je parierais tout ce que j'ai que ce manuscrit est authentique.
I’d bet everything I have that this manuscript is authentic.
— Atlantide, l'empire perdu (2001)
Je le parierais.
I'd bet on it.
Je ne parierais pas sur ça si j'étais toi.
I wouldn’t bet on that if I were you.