Answer:
The Raven" is delivered mainly in simple past tense, from a first person of view.
Explanation:
Most of the poem talks about a past experience, and it's this person's experience. For example, we can see in the opening stanza:
"Once upon a midnight dreary, while I pondered, weak and weary(...)
(...) While I nodded, nearly napping, suddenly there came a tapping(...)".
The whole poem is mainly in this simple past tense from the first person view, the speaker who is talking about his experience.