The patient had died before the doctor came. Which tense is it?

in the given sentence, "The patient had died before the doctor came," the verb "had died" is in the past perfect tense. The past perfect tense is formed by using the auxiliary verb "had" followed by the past participle of the main verb. It is used to describe an action that occurred before another past action or event. In this case, the patient's death (past perfect) happened before the doctor's arrival (simple past).