to be一問..

"believe" something/somebody "to be" something/somebody

"believe" = 認為; to think that something is true or possible, although you are not completely certain
"to be" = 就是

Christians believe the Santiago de Compostela cathedral to be the burial place of St James the Greater, one of Jesus's apostles.

基督徒"認為"，聖地亞哥德孔波斯特拉大教堂"就是"耶穌基督其中一個門徒--聖雅各的埋葬地點。

to be=be(成為)
(Hope that I can help you!!!!!)^-^