* In _Hamlet_, Hamlet says, "To be, or not to be: that is the question." This line is ironic because Hamlet is actually contemplating whether to commit suicide or not, which is a very different question than the one he poses.
* In _Macbeth_, Macbeth says, "Out, damned spot!" This line is ironic because Macbeth is trying to wash away the blood from his hands, but the blood is actually invisible.
* In _King Lear_, Lear says, "I have no reason to live." This line is ironic because Lear is actually very close to death.
* In _The Tempest_, Prospero says, "We are such stuff as dreams are made on." This line is ironic because Prospero is actually a very powerful sorcerer, not a dream.