I.v.71-72

II.ii.51-53

 III.i.107

 IV.ii.6

 V.i.32

 V.v.28-29

A metaphor is being used to compare fear and favor to not show guilt, but instead cover it with innoccence. A couplet is also in use since it gives two rhyming words in the end. 

These quotes uses irony to show that men are usually the ones to be stronger in a sitaution. In this case, it is Lady Macbeth, the woman, that tries to be the stronger one. She ends up taking over the situation to do something about it. 

Although Macduff meant to do the right thing, Lady macduff was suspicious of the situation in which she was angered for him leaving their family. Thus foreshadowing the dreadful death of Macduff's wife and kids. 

A metaphor is being used  to compare Macbeth's tragedy for all the guilt he went rhough was for nothing. All the fight, killing, and guilt was just all suffrage.