What are some examples of verbal irony in “The Cask of Amontillado”?

In Poe’s short story “The Cask of Amontillado,” he uses verbal irony to create tension and dark humor.

For example, Montresor offers Fortunato wine, saying, “It will help to keep us warm.” This statement is ironic because Montresor is leading Fortunato to a cold, damp catacomb, where he plans to kill him. Later, Fortunado says, “I drink to the dead who lie sleeping
around us.” Montresor responds, “And I, Fortunato—I drink to your long life,” though he means the opposite.

The verbal irony in “The Cask of Amontillado” complements the story’s dramatic irony, building tension for the reader, who is aware of Montresor’s true intentions.