Which lines in this excerpt from edgar allan poe's "the raven" use flashback
once upon a midnight dreary, while i pondered weak and weary,
over many a quaint and curious volume of forgotten lore,—
while i nodded, nearly napping, suddenly there came a tapping,
as of some one gently rapping, rapping at my chamber door.
"'tis some visitor," i muttered, "tapping at my chamber door—
only this, and nothing more."

ah, distinctly i remember it was in the bleak december,
and each separate dying ember wrought its ghost upon the floor.
eagerly i wished the morrow; —vainly i had sought to borrow
from my books surcease of sorrow—sorrow for the lost lenore—
for the rare and radiant maiden whom the angels name lenore—
nameless here for evermore.

Explanation:

Edgar Allan Poe's poem  "The Raven" remains the most well known and best-known ballad that he at any point composed. Amid the last long periods of his life, Poe was regularly alluded to as "the raven," and his perusers frequently wove expressions from the ballad into their day by day talk.

"The Raven" is an emotional monolog, a structure in which the speaker inconspicuously uncovers his mental state. "The Raven" comprises of eighteen six-line stanzas told from the point of view of an insightful young fellow. The speaker's states of mind change as he translates the raven's essence and the significance of a solitary articulation, "Nevermore," and plummets further and more profound into hopelessness.

none because there is no words that describe a noun and give a mood