Verbal irony is when the narrator says something that contradicts their true feelings or intentions. Essentially, verbal irony is when a statement has an underlying meaning that contrasts with its literal meaning. In the short story Tell-Tale Heart, the narrator mentions that he plans on killing the old man. He goes on to say,
"During all of that week I was as friendly to the old man as I could be, and warm, and loving" (Poe 2).
This would be considered verbal irony because the narrator is anything but loving and warm. He is plotting to kill the old man, yet describes himself as "loving." A loving person would never plot to commit murder.
Another example of verbal irony takes place after the narrator buries the mutilated body. The police arrive and the narrator comments,
"I took them through the whole house, telling them to search it all, to search well" (Poe 4).
The narrator obviously does not want the police to search everywhere because if they did, they would surely uncover the old man's body. The narrator simply tries to avoid suspicion by making this contradictory statement which also classifies as an example of verbal irony.