To this list I would like to add: "Research shows", "The author intends", "Research suggests", "The author goes on to say", and "The author continues."
A big part of doing a research paper is quoting and citing the research of others. If you would like to express yourself more then let me suggest that you do an Ethnography. This acceptable writing format allows you to engage in 'participant observation.' You can observe a situation, classroom, and/or phenomenon and make your own observations. Your own thoughts then become a focal point of your research as you record your experience.
Otherwise, you will be researching other people's work and then organizing the data. You will be able to express your own ideas in the conclusion but more often than not it will be a reflection of your source material. Good luck!