If you are using this phrase at the beginning of a sentence: It is my belief that... It is my understanding that... It is believed that... If you are using this phrase alone: I find this believable. If you are using the phrase on its own: I am satisfied that this is correct. I am convinced that this is the truth.

Oi, Camila. Há alguns modos: - I think that - I trust that - I guess that - I feel that - I am sure that - I am positive that - I am confident that - I am convinced that - I am of the opinion that E muitas outras. Depende do resto da frase. Boa sorte!

I believe that you are going to fuck with me promtly. I believe that you will be my fiancee promtly I believe that you fuck better than my fiacee ( I suppose so) I believe that you suck dicks very good