Can someone help me with the analysis of Macbeth?

Question

How does the porter in act two scene three draw parallels?

Answer 1

Act 2, scene 3

In a "comic relief" scene, the Porter (doorman) hears knocking at the gate and imagines that he is the porter at the door to h**l. He imagines admitting a farmer who has committed suicide after a bad harvest, an "equivocator" who has committed a sin by swearing to half-truths, and an English tailor who stole cloth to make fashionable clothes and visited brothels. Since it is "too cold for h**l" at the gate, he stops there instead of continuing with a longer catalogue of sinners and opens the door. Outside are Macduff and Lennox, who scold him for taking so long to answer the door. The Porter claims that he was tired after drinking until late, and delivers a small sermon on the ills of drink.

Macbeth enters, and Macduff asks him if the king is awake yet. On hearing that the king is still asleep, Macduff leaves to wake him. While he is gone, Lennox tells Macbeth that the night was full of strange events in the weather ­ chimneys were blown down, birds screeched all night, the earth shook, and ghostly voices were heard prophesying bad fortune. A stunned Macduff returns with the news that the king is dead. He tells them to go see for themselves and calls to the servants to ring the alarm bell and wake the other guests.

Lady Macbeth and Banquo enter and Macduff informs them of the king's death. Macbeth and Lennox return and Macbeth laments the king's death, claiming that he witches he was dead instead of the king. Malcolm and Donalbain appear and ask who murdered their father. Lennox tells them that the bodyguards must have done it because they still had the king's blood on their faces and hands and the daggers on their pillows. Macbeth tells them that he has already killed the bodyguards in a grief-stricken rage. When Malcolm and Donalbain question this act, Lady Macbeth pretends to faint in order to distract them. Aside, Malcolm and Donalbain confer and decide that their lives are threatened and they should flee. As Lady Macbeth is being helped to leave, Banquo counsels the others to get together to analyze what just happened and figure out what to do next. Leaving Malcolm and Donalbain alone, they leave to meet in the hall. Malcolm decides that he will flee to England, and Donalbain says that he will go to Ireland.

Answer 2

Have a  look at these sites.  The first three links comment specifically on the porter scene. They should give you ideas for your answer. The second three links take you to study guides for Macbeth, and they should give you additional information. Best of luck with your work.