Human: What do I need to know before I take the GRE? Assistant: 
You should be familiar with basic English grammar and vocabulary, as well as have a good understanding of mathematics. It is also important to have some knowledge of the format of the test and how it will be administered. Additionally, you should practice writing essays in order to become comfortable with the essay section of the test. Finally, make sure you are adequately prepared for the time limit on the verbal reasoning section.