How do we know that Banquo suspects the Macbeth's of the murder?

Answer 1

Yes, Banquo suspects Macbeth in Act 3 Scene 1. He meets with Macbeth in a room of the royal palace at Forres. It's after Macbeth's coronation at Scone. Banquo comments on the truth of the three witches' three predictions for Macbeth: the thaneship of Glamis and Cawdor, and the kingship of Scotland. He concludes, '...and I fear/Thou played'st most foully for 't' [Lines 2-3].

Answer 2

In Act 3 Scene 1 of the Shakespearean play 'Macbeth', Banquo suspected that the facts of the royal murder of Act 2 might not have been facts after all. He indicated that the witches' predictions for Macbeth [d. August 15, 1057] had come true in terms of promotions to the Thane of Cawdor and the King of Scotland. But he must have been aware of the raging, uncontrollable ambition that accompanied his friend and fellow General's extreme bravery on the battlefield. Right off the bat, Banquo suspected foul play. He came out and said, '...I fear/Thou played'st most foully for 't' [Act 3 Scene 1 Lines 2-3].

Answer 3

In the first scene of act III, you can see that there is a soliloquy in which Banquo is talking to himself. He starts thinking of the witches' prophecies about Macbeth and how they all came true so quickly, although none of his prophecies came true.

He says that Macbeth has become everything, even a king, although the throne was promised to be [his] descendants'. He concludes that Macbeth must have done some cheating to gain all of the titles.

Besides, Macbeth was feeling that Banqou was a threat to him since he was there with him when meeting the witches and hearing the prophecies.

Answer 4

because Banquo saw how Lady Macbeth and Macbeth act

Answer 5

He says so. He thinks macbeth "play'd most foully for it".

Answer 6

He suspects Macbeth of murdering Duncan and Banquo.