Croire usually means "to believe, think":
- Il ne me croit pas
He doesn't believe me
Je crois y avoir réussi
I think I've succeeded
Croire que
Croire que, "to think/believe that," is followed by the indicative when it's affirmative, but the subjunctive when it's negative or interrogative:
- Je crois qu'elle va venir avec nous
I think she's going to come with us
Il ne croit pas que je puisse le faire
He doesn't believe I can do it
Crois-tu que nous ayons assez de temps ?
Do you think we have enough time?
Croire à / en
Croire à and croire en both mean "to believe, have faith in":
- Les enfants croient toujours au Papa Noël
The kids still believe in Santa Claus
Je ne sais pas s'il croit en Dieu
I don't know if he believes in God
Se croire
Se croire means "to believe/think oneself, to feel as if":
- Il se croit très malin
He thinks he's really clever
On se croirait en vacances
You'd think we were on vacation, It feels like we're on vacation
Expressions with Croire
Conjugations
Present tense
- je crois
tu crois
il croit
nous croyons
vous croyez
ils croient
