In act 2 scene 2 of Macbeth use iambic pentameter!!?

Question

In act 2 scene 2 of Macbeth use iambic pentameter to explain how and why Lady Macbeth are suppose to deliver line 16 and 17??
Please help me it is for my H english!!!!

Answer 1

They've just carried out their plan to murder Duncan. Their hearts must be racing; their emotional rhythms are going haywire.

When you read line 16 as if it were a single line delivered by one speaker, it is a smooth, regular line of iambic pentameter (with an unstressed 11th syllable at the end). But Shakespeare has chopped it into four short lines alternated between two speakers. Three question marks. Two monosyllabic utterances. Good actors would probably take that fragmentation as a signal to speak the lines with a jagged, frantic delivery that barely acknowledges the meter.

As for line 17, it simply isn't a line of iambic pentameter -- a pair of stressed monosyllables at the beginning, two trochees at the end. Shakespeare is using the departure from standard meter to indicate the turmoil of the moment, the emotional and moral breakdown. Good performers would never say:

ay HARK who LIES i' TH' sec OND cham BER