This paper is to look for, comprise, and understand the future expression in English and Korean middle school textbooks. Generally, there are three tense systems in almost every language. But there are two tense systems in English and Korean. There are six kinds of future expressions in English and four kinds of future expressions in Korean. It is said that time, tense, and aspect have to be differentiated because they have not only common parts but also different parts. In English, future expressions are ``will``, ``shall``, ``be going to``, ``be about to``, ``be to``, and ``progressive aspect``. On the other hand, future expressions in Korean are ``~ hagetta``, ``~halgeoida``, ``~haryeogohanda``, and ``~halyegeongida``. According to middle school textbooks, future expressions are more complicated in English than in Korean. Because many different expressions exist, they are not easy to be understood and used appropriately. In conclusion, there are two tenses (past tense and present tense), future expressions in English and Korean. Through this paper, we have to understand and be able to differentiate these tense systems.