Then and now

G:
Then (Act III, Scene IV)
Lady Macbeth says "Why do you make such faces? when all's done, You look but on a stool.
Lady M, is saying why are you acting weird, there is nothing here. (Macbeth sees Banquos Ghost)

Now Act V
Lady M says " i tell you yet again, Banquo's buried; he cannot come out on's grave.
I think lady M in this scene is re-living the moment in Act III when she was at dinner with Macbeth and he went crazy.

H:
Then (Act II, Scene II)
I hear a knocking at the south entry. Retire we to our chamber.
Lady Macbeth heres a knocking and feels like someone might have found the body.

Now Act V
To bed, to bed. There's a knocking at the gate.
When Lady M is saying this in her sleep she now feels scared she will get caught.