The witches <span>predict that Macbeth will someday become king.</span>
It is irony. Normally, when someone is unusually prompt, they are early. However, the speaker is using irony to say that her doctor is always late.
He tries to correct the mistake by using the flower on Demetrius, but this now means that both Lysander and Demetrius love Helena. The lovers squabble over this new situation and so Oberon must try and right his servant's wrongs once and for all.
