How do you say believe in french?

croire (krwahr) - to believe

past part. cru (krew)

je crois (krwah)

tu crois (krwah)

il croit (krwah)

nous croyons (krwah-yoh[n])

vous croyez (krwah-yay)

ils croient (krwah)

Note: Careful on the "ils" form, which sounds the same as the singular "il" form. Some people get confused with "boire" and say "ils croivent".