Must – deber
(Pronounced deh-behr)
To remember that must is pronounced deh-behr (deber) in Spanish, use the following mnemonic:
You must defend the bears (deber) from Goldilocks.

Examples of deber (must) in a sentence
Yo debo estudiar más para mis exámenes.
(I must study more for my exams.)
Tú debes llegar a tiempo a la reunión.
(You must arrive on time to the meeting.)
Ella debe tomar sus medicamentos cada día.
(She must take her medication every day.)