"But is it not getting late? Will they not be awaiting us at the palazzo, the Lady Fortunato and the rest? Let us be gone" (Poe). When Fortunato says this to Montresor, he thinks they will get this over with then head back to the palazzo. The reader and Montresor, though, know that he will not be going back because Montresor is going to kill him.
Situational Irony
"The cough is a mere nothing: it will not kill me. I shall not die of a cough" (Poe) When Fortunato exclaims this, he doesn't know that he will actually die in the future. He still would have died even if he didn't say this though.
Dramatic Irony
"I huge human foot d'or, in field azure: the foot crushes a serpent rampant whose fangs are imbedded in the heel" (Poe) While Montresor and Fortunato are walking down the catacombs, they speak of Montresor's family arms. The arms foreshadow that Montresor is going to get Fortunato back for whatever he did.
Situational Irony
"My dear Fortunato, you are luckily met" (Poe). In this instance, Montresor tells Fortunato that he is luckily met. Only does Montresor know, that Fortunato is not lucky because he will be murdered later that night.
"I drink,' he said, 'To the buried that repose around us" (Poe). When Fortunato says this, it is very dramatic because he doesn't know that soon he will be one of the buried soon.
"I had told them that I should not return until the morning and had given them explicit orders not to stir from the house" (Poe). This is very ironic because Montresor knows they will leave the house, disobeying his orders. This leaves an empty house for him to kill Fortunato in. It also leaves witnesses, for the maids will say they were home all night so they don't get in trouble with their master when people try to figure out who killed Fortunato. This will most likely make Montresor not a suspect.
Lets go party fr the night while the master is out, he will never know we were gone!!