Ed excel English Literature poetry exam tommorow..Watch
You should follow this introduction up with three paragraphs: one comparing how the poets use form to present the question's theme; one comparing how the poets use language to present the question's theme; one comparing how the poets use structure to present the question's theme. You should aim to use two examples in each paragraph. I also strongly recommend using at least three quotes from your chosen poem. You should aim to embed many quotes as evidence for your interpretations on the question's poem, especially since the text will be right in front of you. These three paragraphs can be written in any order, I personally went with form first, language second and structure third.
Finally, finish off with a conclusion condensing what you have just wrote in the main body of your answer.
I believe this is a winning formula. It served me well, and full marks in poetry for the real exam is a testament to its success.