Answer:
Many people believe verbal irony to be synonymous with sarcasm, but sarcasm is only one of the common types of verbal irony. It appears in four basic forms:
sarcasm (saying “Oh, fantastic!” when the situation is actually very bad)
Socratic irony (pretending to be ignorant to show that someone else is ignorant: "I'm confused, I thought your curfew was at 11. Isn't it past 12 now?")
understatement (saying "We don't get along" after having a huge fight with someone)
overstatement (saying "I'll die if I can't go to the concert!")