they thought that
They thought they already knew.
Creyeron que la batalla de Saipán duraría solo un año.
They believed the battle of Saipan would last only a year.
— El niño y la garza (2023)
They thought we didn't like it.
Seguro creyeron que era un viejo llevando el curso.
They probably thought it was an old man leading the course.
Ellos creyeron que podían ganar.
They believed they could win.
Creyeron que Marsella era la capital de Francia.
They thought Marseille was the capital of France.