The document discusses the use of future probability words like WILL, MAY, and MIGHT to make predictions about future events. WILL is more definite than MAY or MIGHT. MAY and MIGHT are followed by a verb without "to" and are used to express varying levels of probability, with MAY being more probable than MIGHT. Some examples given of predictions for 2050 using these words include that most probable the earth will be warmer, doctors may be able to cure cancer, and people may travel more, while least probable possibilities include there might be no cars, people might not be able to use cash, and English may not be the only language.