1 (considerar cierto) to believe
nadie me cree nobody believes me; créame believe me; take my word for it; no creo lo que dijo I don't believe what she said
¡ya lo creo!
—¿quieres un café? —¡ya lo creo! "do you want some coffee?" — "you bet!" (familiar); ¡ya lo creo que está roto! you bet it's broken!; it certainly is broken!
¿que yo voy a ir andando hasta el faro? ¡ya lo creo! you think I'm going to walk all the way to the lighthouse? you must be joking! (familiar); ¿que tú no sabías lo del examen? ¡sí, sí, ya lo creo! you didn't know about the exam? oh, sure you didn't! (familiar)
2 (pensar) to think
creen haber descubierto el motivo they think (that) they've discovered the reason
creer que to think (that)
no creo que pueda ir I don't think I'll be able to go; creo que es sincera I think she's sincere; I believe her to be sincere
creo que sí I think so; creo que no I don't think so; no puedo creer que esto esté pasando I can't believe this is happening
no se vaya usted a creer que ... don't go thinking that ...; I wouldn't want you to think that ...
3 (considerar) to think
no lo creía capaz de hacerlo I didn't think him capable of doing it
lo creo mi deber I think o consider it (to be) my duty