The Subjunctivisor!
Does creer require the subjunctive?
Creer may require the subjunctive, depending on whether it is used affirmatively, negatively, or interrogatively:
Por ejemplo …
Cree que canta mejor que yo.
He thinks he sings bettter than I.No cree que cante mejor que yo,.
He doesn’t think he sings better than I.¿Cree que cante mejor que yo?
Does he think he sings better than I?