You can combine dever with any verb in the infinitive to express should/must. Like this:
Eu devo trabalhar hoje. I should work today.
Você deve ir. You should go.
Ela deve saber. She must know.
Ela deve ser apaixonada. She must be in love.
You can combine dever with any verb in the infinitive to express should/must. Like this:
Eu devo trabalhar hoje. I should work today.
Você deve ir. You should go.
Ela deve saber. She must know.
Ela deve ser apaixonada. She must be in love.