Usages of creer
Creo que su negocio tendrá mucho éxito si sigue publicitando en redes sociales.
I believe her business will be very successful if she keeps advertising on social media.
Creo que es importante descansar al mediodía.
I believe that it is important to rest at midday.
Creo que el éxito en la escuela es importante.
I believe that success in school is important.
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We have an entire course teaching Spanish grammar and vocabulary.