should have; must have (depending on context)Dever changes form to agree with the subject. In the infinitive, the exact phrase is “dever ter”; conjugated forms include “deve ter” and “devia ter.”
PO: Em português, “dever ter” pode expressar uma expectativa, como em “Deve ter razão.”
EN: In Portuguese, “dever ter” can express an expectation, as in “He must be right.”