This document discusses appropriate use of tense in academic and research writing. It provides examples of how different tenses should be used depending on the purpose, such as using present tense in literature reviews to describe current views and past tense to report on previous research findings. The document also discusses using active rather than passive voice and modals to indicate possibilities. Correct tense usage is important for clarity and avoiding misleading readers about cause-effect relationships or implying things occurred in an illogical order.