Let us go, nevertheless. The cold is merely nothing.
An example of verbal irony is when Montresor is leading Fortunato into his catacombs. While this is happening, Fortunato keeps coughing from the niter in the catacombs, and Montresor seemingly tries to get Fortunato to turn back.
An example of situational irony in the Cask of Amontillado is when Montresor tells his servants that he would "not return until morning" and that he has given them "explicit orders" to remain, but the servants are not there when Montresor arrives back in the night.
Luchesi cannot tell amontillado from sherry!
An example of dramatic irony is Fortunato walking into the catacombs with Montresor. Fortunato thinks he is only going down there to drink Amontillado, but we know that he will captured by Montresor because of him insulting Montresor.
Amontillado! Come, let us go to your vault.
One example of Foreshadowing is the character being named Fortunato. This name alludes to the "fortune" of Fortunato, as he will be trapped in the catacombs by Montresor.
Another example of foreshadowing is when Montresor seemingly tries to convince Fortunato to have Luchesi come, but Fortunato is stubborn enough to go himself for the wine, which shows his stubborness is what will get him killed.
Lastly, another example of foreshadowing is in the beginning of the book, when it mentions Fortunato's connoisseur-ship in wine, which will lead to him being led into the catacombs for amontillado and he will be trapped.