was sure that
Estaba segura de que se me escapaba algo, pero quizá no importaba qué.
I was sure I was missing something, but maybe it didn’t matter what.
I was sure it was you.
Estaba segura de que tenías a alguien, una zorra, como la de Peppe.
I was sure you had someone, a slut, like Peppe's.
— Perfectos desconocidos (2016)
No estaba segura de que creyera que yo era tan crédula, pero iba a intentarlo.
I wasn’t sure he thought I was that gullible, but I was going to try.
Estaba segura de que iba a aprobar el examen final.
I was sure I was going to pass the final exam.