At first he believes he does not have to because he has already become the thane.
Lady Macbeth talked Macbeth into killing his cousin, King Duncan of Scotland, who was a guest in his house at the time.
She helps Macbeth out by tricking him into killing the king. :P
she talked him into killing the King by accusing Macbeth of being weak and cowardly
Because you don't mess with Lady MacBeth
his wife.
The king
she talked him into killing the King by accusing Macbeth of being weak and cowardly
Macbeth was the Thane of Glamis and one of Duncans generals. After killing Macdonwald, Macbeth became the Thane of Cawdor, and later the King of Scotland (after killing the king)
After killing Duncan, Macbeth could not sleep. He feels the guilt and is terrified
Macbeth was not a vassal of King Duncan. Macbeth's act of killing King Duncan would be considered regicide because he unlawfully killed his king, who was his sovereign and ruler.
by calling him a coward
macduff