Question

By the time the doctor arrive the patient had died. the appropriate tense
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Answer 1

Answer:

The past perfect tense is not usually used alone. It is mainly used with the simple past tense and then it refers to an action that has already happened by the time another action had commenced. The patient had died before the doctor arrived. (NOT The patient died before the doctor had arrived.)

Answer 2

Answer:

past tense

Explanation:

because here died is second form of verb and we know that second form of verb is used in past tense