they plan to kill Duncan
Macbeth is excited because the witches predict that he will become king, fulfilling his ambition. However, he is also fearful because he knows he will have to take drastic and possibly violent actions to make the prediction come true. This mixture of excitement and fear highlights Macbeth's internal conflict and foreshadows the moral dilemmas to come.
How Macbeth feels about the witches' predictions changes throughout the play. Sometimes he thinks they can be thwarted, as when he tries to kill Banquo and Fleance. At other times he thinks they can be relied upon. He is not sure how he feels.
The conflict that rages in Macbeth after he hears the witches prophecy is if he has to take some action to make the prediction true or if it's all up to fate. When he hears Duncan say that Malcolm is to become the next king he knows he has to take action for the prophecy to come true.
Macbeth attempts to act casual about the witches prophecies and lies to Banquo when he tells him he doesn't think about the prediction at all. In actuality, not only is it on his mind, but he is planning to kill Duncan to make the prophecy come true.
The witches predict that Macbeth will be king and how he will fall. These predictions cause Macbeth to dedicate his life to following the witches predictions, doing whatever it takes to make them come true, or to avoid them.
The witches only gave Macbeth prophecies. It was his decision to do so after Lady Macbeth persuaded him. Although the witches' intentions was probably to cause this murder, the witches did not make Macbeth muder Duncan.
The three witches predict that Macbeth will become the Thane of Cawdor and then the King of Scotland. They also predict that Banquo's descendants will inherit the throne, sparking Macbeth's ambition and actions to make the prophecies come true.
the witches told Macbeth that he would be king, and he is worried about his role in making the prediction come true.
In response to Macbeth's questions, the witches prophecize that Macbeth will become king and encourage him to take action to make the prophecy come true. They manipulate his ambition and plant seeds of greed and paranoia, which ultimately lead to Macbeth's downfall.
Some believe that real witches were behind the curse of Macbeth because the play features three witches who make prophecies that ultimately lead to Macbeth's downfall. The play's references to witchcraft and the supernatural have contributed to the belief that real witches may have been involved in the play's creation and curse.
The witches don't make Macbeth perform any dark acts, such as killing King Duncan; they just put the idea in his head. The witches tell Macbeth he is the Thane of Cawdor (which he doesn't know yet) and also tell him that he will be king. Once Macbeth finds out he is in fact the Thane of Cawdor, he begins to believe the witches' prophecies. Lady Macbeth convinces him that the only way Macbeth can be king is by killing King Duncan, and he does so. The witches' role in making Macbeth a tragic hero is to serve a catalyst for Macbeth's dark thoughts.
The three witches in Macbeth tell Macbeth and banquo that Macbeth will be king of the land. Banquo asks what is in store for him , and the witches reply , that his sons will inherit the throne. In later story Macbeth Kills banquo so it is his sons that are heir to the throne.