Begin by writing an introduction. It doesn't have to be perfectly worded or polished just yet. What you are looking to do is get on paper an introduction that explains why the reader should be interested in your topic, illustrates the problem or question you hope to answer, briefly locates your research within the broader academic community, and, finally, reaches out to your intended audience.
Write an expanded statement of the problem or research question as you see it. Explain the issue in terms that would be understandable to someone who knew a bit about English generally, but nothing specific about your project. You want the problem to stand out as something clearly needing to be researched. It may help to pretend your are attempting to convince the reader to do the research.
Write a purpose statement. This will be the first time your reader is introduced to your hypothesis. Here you should clearly identify both the specific question you wish to answer and the intended method for answering it. Are you using a specific research method? Detail it here.
Write a literature review. This section will illustrate clearly how your research fits in to the larger academic body of work. You should identify two to four "schools of thought," or existing answers to your research question, or methods by which other individuals have attempted to answer the question. Start with the least applicable school of thought, and work your way down to the school that is closest to the method you chose. Explain how all of these existing bodies of work fail to answer the research question you have proposed. Feel free to define your thought process based on one of the schools you found in the existing research, as long as you clearly cite them.
Write a section detailing the limitations of the method you have chosen, or your research question specifically. No one paper is going to be definitive and without room for improvement. Identifying the limitations of your proposal will make the difference between an undergraduate paper that exhibits hubris, and one that is humbly attempt to make a foray in to a field. This is also a section where you can outline future avenues of research, for other researchers that may come across your work.